Workbook Detail
Number Detective Easy — Set 7
Use the clues to find the mystery number.
Show answer
Answer: 15
- Clues
- My ones digit is 5.
- My digits add up to 6.
- AnswerRange
- 1
- 20
- Visual
- Type: inline-svgSvg: <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 44 44" width="44" height="44"><g transform="translate(4,4) scale(1)"><path fill="#3E721D" d="M35 26c0 2.209-1.791 4-4 4H5c-2.209 0-4-1.791-4-4V6.313C1 4.104 6.791 0 9 0h20.625C32.719 0 35 2.312 35 5.375V26z"/><path fill="#CCD6DD" d="M33 30c0 2.209-1.791 4-4 4H7c-2.209 0-4-1.791-4-4V6c0-4.119-.021-4 5-4h21c2.209 0 4 1.791 4 4v24z"/><path fill="#E1E8ED" d="M31 31c0 1.657-1.343 3-3 3H4c-1.657 0-3-1.343-3-3V7c0-1.657 1.343-3 3-3h24c1.657 0 3 1.343 3 3v24z"/><path fill="#5C913B" d="M31 32c0 2.209-1.791 4-4 4H6c-2.209 0-4-1.791-4-4V10c0-2.209 1.791-4 4-4h21c2.209 0 4 1.791 4 4v22z"/><path fill="#77B255" d="M29 32c0 2.209-1.791 4-4 4H6c-2.209 0-4-1.791-4-4V12c0-2.209 1.791-4 4-4h19.335C27.544 8 29 9.456 29 11.665V32z"/><path fill="#3E721D" d="M6 6C4.312 6 4.269 4.078 5 3.25 5.832 2.309 7.125 2 9.438 2H11V0H8.281C4.312 0 1 2.5 1 5.375V32c0 2.209 1.791 4 4 4h2V6H6z"/></g></svg>AltText: book greenPlacement: before-question
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Use the clues to find the mystery number.
Show answer
Answer: 17
- Clues
- I am an odd number.
- My tens digit is 1.
- My digits add up to 8.
- AnswerRange
- 1
- 20
- Visual
- Type: inline-svgSvg: <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 44 44" width="44" height="44"><g transform="translate(4,4) scale(1)"><path fill="#292F33" d="M35 26c0 2.209-1.791 4-4 4H5c-2.209 0-4-1.791-4-4V6.313C1 4.104 6.791 0 9 0h20.625C32.719 0 35 2.312 35 5.375V26z"/><path fill="#CCD6DD" d="M33 30c0 2.209-1.791 4-4 4H7c-2.209 0-4-1.791-4-4V6c0-4.119-.021-4 5-4h21c2.209 0 4 1.791 4 4v24z"/><path fill="#E1E8ED" d="M31 31c0 1.657-1.343 3-3 3H4c-1.657 0-3-1.343-3-3V7c0-1.657 1.343-3 3-3h24c1.657 0 3 1.343 3 3v24z"/><path fill="#292F33" d="M31 32c0 2.209-1.791 4-4 4H6c-2.209 0-4-1.791-4-4V10c0-2.209 1.791-4 4-4h21c2.209 0 4 1.791 4 4v22z"/><path fill="#66757F" d="M29 32c0 2.209-1.791 4-4 4H6c-2.209 0-4-1.791-4-4V12c0-2.209 1.791-4 4-4h19.335C27.544 8 29 9.456 29 11.665V32z"/><path fill="#292F33" d="M6 6C4.312 6 4.269 4.078 5 3.25 5.832 2.309 7.125 2 9.438 2H11V0H8.281C4.312 0 1 2.5 1 5.375V32c0 2.209 1.791 4 4 4h2V6H6z"/><path d="M7 8h3v4H7zm7 0h4v4h-4zm12 .056c-.214-.031-.433-.056-.665-.056H22v4h4V8.056zM18 12h4v4h-4zm8 0h3v4h-3zm-16 0h4v4h-4zm-3 4h3v4H7zm7 0h4v4h-4zm8 0h4v4h-4zm-4 4h4v4h-4zm8 0h3v4h-3zm-16 0h4v4h-4zm-3 4h3v4H7zm7 0h4v4h-4zm8 0h4v4h-4zM7 32h3v4H7zm7 0h4v4h-4zm8 4h3c.347 0 .679-.058 1-.141V32h-4v4zm-4-8h4v4h-4zm8 0h3v4h-3zm-16 0h4v4h-4z" fill="#CCD6DD"/></g></svg>AltText: notebookPlacement: before-question
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Use the clues to find the mystery number.
Show answer
Answer: 10
- Clues
- I am less than 12.
- I am a multiple of 2.
- My tens digit is 1.
- AnswerRange
- 1
- 20
- Visual
- Type: inline-svgSvg: <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 44 44" width="44" height="44"><g transform="translate(4,4) scale(1)"><path fill="#FFCC4D" d="M35.106 33.172L2.828.894C1.273-.662 0-.135 0 2.065V32c0 2.2 1.8 4 4 4h29.935c2.2 0 2.727-1.272 1.171-2.828zM16.967 28H10c-1.1 0-2-.9-2-2v-6.968c0-1.1.637-1.363 1.414-.586l8.139 8.14c.777.777.513 1.414-.586 1.414z"/></g></svg>AltText: triangle rulerPlacement: before-question
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Use the clues to find the mystery number.
Show answer
Answer: 14
- Clues
- My digits add up to 5.
- My tens digit is 1.
- AnswerRange
- 1
- 20
- Visual
- Type: inline-svgSvg: <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 44 44" width="44" height="44"><g transform="translate(4,4) scale(1)"><path d="M11.946 27C-1.036 7.876 7.524 2.752 9.114 2c.149-.07.242-.105.245-.107.418-.209.638-.675.529-1.125C9.779.318 9.372 0 8.903 0H4.847C1.054 0-4.282 11 5.859 28c.151.253 5.073 0 5.073 0 .559 0 1.324-.541 1.014-1zM31.229 0h-4c-.462 0-.863.318-.971.768-.107.45.109.916.521 1.125.004.002.095.037.242.107 1.568.752 10.01 5.876-2.792 25-.307.459.448 1 1 1 0 0 4.854.253 5.002 0 10-17 4.739-28 .998-28z" fill="#C1694F"/><path d="M6.889 28.836l.004.01c-.064-.293 5.363-1.387 5.053-1.846C-1.036 7.876 7.524 2.752 9.114 2H4.845C1.053 2-3.268 13 6.889 28.836zM31.231 2h-4.21c1.568.752 10.01 5.876-2.792 25-.307.459 4.984 1.839 4.986 1.836C39.231 13 34.971 2 31.231 2z" fill="#662113"/><path fill="#C1694F" d="M9.916 8c-.561 0-1.015-.448-1.015-1 0-3.316-2.028-5-4.056-5-.47 0-.08-.782.029-1.232.11-.45.516-.768.985-.768h5.071c3.791 0 4.938 6.136 5.057 6.835.049.29-.034.586-.226.811-.195.225-.478.354-.775.354h-5.07zm16.315 0c.553 0 1-.448 1-1 0-3.316 2-5 4-5 .463 0 .078-.782-.029-1.232-.107-.45-.508-.768-.971-.768h-5c-3.738 0-4.869 6.136-4.986 6.835-.049.29.033.586.223.811.191.225.47.354.763.354h5z"/><path fill="#BE1931" d="M6 32s0 4 4 4h16s4 0 4-4V10s0-4-4-4H10c-4 0-4 4-4 4v22z"/><path fill="#A0041E" d="M24 28H12c-2.201 0-3-1.794-3-3V11c0-.552.448-1 1-1s1 .448 1 1v14c.012.45.195 1 1 1h12c.45-.012 1-.194 1-1V11c0-.552.447-1 1-1s1 .448 1 1v14c0 2.201-1.794 3-3 3z"/><path fill="#FFF" d="M16 25s0-1 1-1h2s1 0 1 1v5s0 1-1 1h-2s-1 0-1-1v-5z"/></g></svg>AltText: backpackPlacement: before-question
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Use the clues to find the mystery number.
Show answer
Answer: 6
- Clues
- I am a multiple of 3.
- I am less than 7.
- My ones digit is 6.
- AnswerRange
- 1
- 20
- Visual
- Type: inline-svgSvg: <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 44 44" width="44" height="44"><g transform="translate(4,4) scale(1)"><path fill="#269" d="M32 7H4c-2.209 0-4 1.791-4 4v15c0 2.209 1.791 4 4 4h11.416c.52.596 1.477 1 2.584 1s2.065-.404 2.584-1H32c2.209 0 4-1.791 4-4V11c0-2.209-1.791-4-4-4z"/><path fill="#292F33" d="M20 27c0 1.104-.896 2-2 2s-2-.896-2-2V9c0-1.104.896-2 2-2s2 .896 2 2v18z"/><path fill="#99AAB5" d="M18 26c0 1.104-.896 2-2 2H4c-1.104 0-2-.896-2-2V8c0-1.104.896-2 2-2h12c1.104 0 2 .896 2 2v18z"/><path fill="#E1E8ED" d="M18 26c-.999-1.998-3.657-2-4-2-2 0-5 2-8 2-1 0-2-.896-2-2V8c0-1.104 1-2 2-2 3.255 0 6-2 8-2 3 0 4 1.896 4 3v19z"/><path fill="#99AAB5" d="M34 26c0 1.104-.896 2-2 2H20c-1.104 0-2-.896-2-2V8c0-1.104.896-2 2-2h12c1.104 0 2 .896 2 2v18z"/><path fill="#CCD6DD" d="M18 26c.999-1.998 3.657-2 4-2 2 0 5 2 8 2 1 0 2-.896 2-2V8c0-1.104-1-2-2-2-3.256 0-6-2-8-2-3 0-4 1.896-4 3v19z"/></g></svg>AltText: book openPlacement: before-question
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Use the clues to find the mystery number.
Show answer
Answer: 6
- Clues
- Half of me is 3.
- AnswerRange
- 1
- 20
- Visual
- Type: inline-svgSvg: <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 44 44" width="44" height="44"><g transform="translate(4,4) scale(1)"><path fill="#3E721D" d="M35 26c0 2.209-1.791 4-4 4H5c-2.209 0-4-1.791-4-4V6.313C1 4.104 6.791 0 9 0h20.625C32.719 0 35 2.312 35 5.375V26z"/><path fill="#CCD6DD" d="M33 30c0 2.209-1.791 4-4 4H7c-2.209 0-4-1.791-4-4V6c0-4.119-.021-4 5-4h21c2.209 0 4 1.791 4 4v24z"/><path fill="#E1E8ED" d="M31 31c0 1.657-1.343 3-3 3H4c-1.657 0-3-1.343-3-3V7c0-1.657 1.343-3 3-3h24c1.657 0 3 1.343 3 3v24z"/><path fill="#5C913B" d="M31 32c0 2.209-1.791 4-4 4H6c-2.209 0-4-1.791-4-4V10c0-2.209 1.791-4 4-4h21c2.209 0 4 1.791 4 4v22z"/><path fill="#77B255" d="M29 32c0 2.209-1.791 4-4 4H6c-2.209 0-4-1.791-4-4V12c0-2.209 1.791-4 4-4h19.335C27.544 8 29 9.456 29 11.665V32z"/><path fill="#3E721D" d="M6 6C4.312 6 4.269 4.078 5 3.25 5.832 2.309 7.125 2 9.438 2H11V0H8.281C4.312 0 1 2.5 1 5.375V32c0 2.209 1.791 4 4 4h2V6H6z"/></g></svg>AltText: book greenPlacement: before-question
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Use the clues to find the mystery number.
Show answer
Answer: 12
- Clues
- My ones digit is 2.
- My tens digit is 1.
- AnswerRange
- 1
- 20
- Visual
- Type: inline-svgSvg: <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 44 44" width="44" height="44"><g transform="translate(4,4) scale(1)"><path fill="#DD2E44" d="M35.702 7.477L28.522.298c-.396-.397-1.038-.397-1.436 0L3.395 23.989c-.397.397-.397 1.038 0 1.437.72.719-3.14 7.959-3.395 8.496L2.068 36c.536-.255 7.785-4.115 8.506-3.395.397.397 1.039.397 1.436 0L35.702 8.913c.397-.396.397-1.039 0-1.436z"/><path fill="#EA596E" d="M4.139 23.24L26.407.972l8.62 8.62L12.759 31.86z"/><path fill="#292F33" d="M23.534 3.846l1.437-1.436 8.62 8.62-1.437 1.436zM5.576 21.803l1.436-1.437 8.62 8.62-1.437 1.437z"/><path fill="#BE1931" d="M26.886 9.353c-1.521-1.521-5.982.476-9.967 4.459-3.983 3.984-5.979 8.446-4.459 9.967 1.52 1.521 5.983-.476 9.967-4.459 3.983-3.984 5.979-8.447 4.459-9.967z"/></g></svg>AltText: crayonPlacement: before-question
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Use the clues to find the mystery number.
Show answer
Answer: 14
- Clues
- Half of me is 7.
- AnswerRange
- 1
- 20
- Visual
- Type: inline-svgSvg: <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 44 44" width="44" height="44"><g transform="translate(4,4) scale(1)"><path fill="#FFCC4D" d="M35.106 33.172L2.828.894C1.273-.662 0-.135 0 2.065V32c0 2.2 1.8 4 4 4h29.935c2.2 0 2.727-1.272 1.171-2.828zM16.967 28H10c-1.1 0-2-.9-2-2v-6.968c0-1.1.637-1.363 1.414-.586l8.139 8.14c.777.777.513 1.414-.586 1.414z"/></g></svg>AltText: triangle rulerPlacement: before-question
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Use the clues to find the mystery number.
Show answer
Answer: 17
- Clues
- My ones digit is 7.
- If you double me, you get 34.
- AnswerRange
- 1
- 20
- Visual
- Type: inline-svgSvg: <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 44 44" width="44" height="44"><g transform="translate(4,4) scale(1)"><circle fill="#88C9F9" cx="18" cy="18" r="18"/><path fill="#5C913B" d="M25.716 1.756c-1.022.568-1.872 1.528-3.028 1.181-1.875-.562-4.375-1.812-6-.25s-2 3 0 2.938 3.375-2.438 4.375-1.438.749 1.813-1.625 2.125S14.5 7 13.125 7s-1.688.812-.75 1.688-.563.937-2.125 1.812.375 1.25 1.688 2 2.312-.188 2.875-1.438 2.981-2.75 3.99-2.562c1.01.188 1.01.688.822 1.562s.75.625.812-.375 1.188-1.75 2.062-1.812 1.625 1.188.625 1.812-2 1.125-.75 1.438 2.125 1.938.688 2.625-3.937 1.125-5.062.562-3.688-1.375-4.375-.938-1.062.89-1.875 1.195c-.812.305-4.125 1.805-4.188 3.743S7.438 22.438 8.75 22.5s4.5-.812 5.5-1.625 2.375-.625 2.812.312.125 1.5-.312 3 .286 2.25.987 3.562c.701 1.312 1.263 2.062 1.263 3s1 1.875 2.5.312 2.875-4.625 3.5-5.75 1.125-3.625 1.875-4.125 1.938-1.688 1.062-1.5-2.625-.062-3.062-1.312-2.312-3.625-1.438-3.875 1.875 1.39 2.25 2.164c.375.774.875 1.711 1.625 1.961s2.375-1.673 2.875-1.961c.5-.289.125-1.476-.875-1.351s-2.312 0-2.312-.624 1.25-1.438 2.25-1.25 1.75.5 2.375 1.25 1.875 2.125 2.375 3 .875 1 1.125-.562c.166-1.038.387-1.609.59-2.222-1.013-5.829-4.82-10.683-9.999-13.148z"/></g></svg>AltText: globePlacement: before-question
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Use the clues to find the mystery number.
Show answer
Answer: 18
- Clues
- Half of me is 9.
- AnswerRange
- 1
- 20
- Visual
- Type: inline-svgSvg: <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 44 44" width="44" height="44"><g transform="translate(4,4) scale(1)"><path fill="#CCD6DD" d="M3 16v-2h30v2zm0 7v-2h30v2zm0 7v-2h30v2zM3 9V7h30v2z"/><path fill="#D5AB88" d="M35 33V1c0-.552-.448-1-1-1h-1c-.552 0-1 .448-1 1H4c0-.552-.448-1-1-1H2c-.552 0-1 .448-1 1v32h34zM4 4h28v29H4V4z"/><path fill="#3B94D9" d="M19 5.5c-.829 0-1.5.671-1.5 1.5 0-.829-.671-1.5-1.5-1.5s-1.5.671-1.5 1.5c0-.829-.671-1.5-1.5-1.5s-1.5.671-1.5 1.5c0-.829-.671-1.5-1.5-1.5S8.5 6.171 8.5 7c0-.829-.671-1.5-1.5-1.5S5.5 6.171 5.5 7v2c0 .829.671 1.5 1.5 1.5S8.5 9.829 8.5 9c0 .829.671 1.5 1.5 1.5s1.5-.671 1.5-1.5c0 .829.671 1.5 1.5 1.5s1.5-.671 1.5-1.5c0 .829.671 1.5 1.5 1.5s1.5-.671 1.5-1.5c0 .829.671 1.5 1.5 1.5.828 0 1.5-.671 1.5-1.5V7c0-.829-.672-1.5-1.5-1.5z"/><path fill="#BE1931" d="M19 12.5c-.829 0-1.5.671-1.5 1.5 0-.829-.671-1.5-1.5-1.5s-1.5.671-1.5 1.5c0-.829-.671-1.5-1.5-1.5s-1.5.671-1.5 1.5c0-.829-.671-1.5-1.5-1.5s-1.5.671-1.5 1.5c0-.829-.671-1.5-1.5-1.5s-1.5.671-1.5 1.5v2c0 .829.671 1.5 1.5 1.5s1.5-.671 1.5-1.5c0 .829.671 1.5 1.5 1.5s1.5-.671 1.5-1.5c0 .829.671 1.5 1.5 1.5s1.5-.671 1.5-1.5c0 .829.671 1.5 1.5 1.5s1.5-.671 1.5-1.5c0 .829.671 1.5 1.5 1.5.828 0 1.5-.671 1.5-1.5v-2c0-.829-.672-1.5-1.5-1.5z"/><path fill="#5C913B" d="M19 19.5c-.829 0-1.5.672-1.5 1.5 0-.828-.671-1.5-1.5-1.5s-1.5.672-1.5 1.5c0-.828-.671-1.5-1.5-1.5s-1.5.672-1.5 1.5c0-.828-.671-1.5-1.5-1.5s-1.5.672-1.5 1.5c0-.828-.671-1.5-1.5-1.5s-1.5.672-1.5 1.5v2c0 .828.671 1.5 1.5 1.5s1.5-.672 1.5-1.5c0 .828.671 1.5 1.5 1.5s1.5-.672 1.5-1.5c0 .828.671 1.5 1.5 1.5s1.5-.672 1.5-1.5c0 .828.671 1.5 1.5 1.5s1.5-.672 1.5-1.5c0 .828.671 1.5 1.5 1.5.828 0 1.5-.672 1.5-1.5v-2c0-.828-.672-1.5-1.5-1.5z"/><path fill="#FFAC33" d="M19 26.5c-.829 0-1.5.672-1.5 1.5 0-.828-.671-1.5-1.5-1.5s-1.5.672-1.5 1.5c0-.828-.671-1.5-1.5-1.5s-1.5.672-1.5 1.5c0-.828-.671-1.5-1.5-1.5s-1.5.672-1.5 1.5c0-.828-.671-1.5-1.5-1.5s-1.5.672-1.5 1.5v2c0 .828.671 1.5 1.5 1.5s1.5-.672 1.5-1.5c0 .828.671 1.5 1.5 1.5s1.5-.672 1.5-1.5c0 .828.671 1.5 1.5 1.5s1.5-.672 1.5-1.5c0 .828.671 1.5 1.5 1.5s1.5-.672 1.5-1.5c0 .828.671 1.5 1.5 1.5.828 0 1.5-.672 1.5-1.5v-2c0-.828-.672-1.5-1.5-1.5z"/><path fill="#3B94D9" d="M29 10.5c-.828 0-1.5-.671-1.5-1.5V7c0-.829.672-1.5 1.5-1.5s1.5.671 1.5 1.5v2c0 .829-.672 1.5-1.5 1.5z"/><path fill="#BE1931" d="M29 17.5c-.828 0-1.5-.671-1.5-1.5v-2c0-.829.672-1.5 1.5-1.5s1.5.671 1.5 1.5v2c0 .829-.672 1.5-1.5 1.5z"/><path fill="#5C913B" d="M29 24.5c-.828 0-1.5-.672-1.5-1.5v-2c0-.828.672-1.5 1.5-1.5s1.5.672 1.5 1.5v2c0 .828-.672 1.5-1.5 1.5z"/><path fill="#FFAC33" d="M29 31.5c-.828 0-1.5-.672-1.5-1.5v-2c0-.828.672-1.5 1.5-1.5s1.5.672 1.5 1.5v2c0 .828-.672 1.5-1.5 1.5z"/><path fill="#BF6952" d="M35 33H1c-.552 0-1 .448-1 1v1c0 .552.448 1 1 1h34c.552 0 1-.448 1-1v-1c0-.552-.448-1-1-1z"/></g></svg>AltText: abacusPlacement: before-question
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Use the clues to find the mystery number.
Show answer
Answer: 9
- Clues
- I am an odd number.
- I am less than 11.
- I am a multiple of 3.
- My ones digit is 9.
- AnswerRange
- 1
- 20
- Visual
- Type: inline-svgSvg: <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 44 44" width="44" height="44"><g transform="translate(4,4) scale(1)"><path fill="#269" d="M35 26c0 2.209-1.791 4-4 4H5c-2.209 0-4-1.791-4-4V6.313C1 4.104 6.791 0 9 0h20.625C32.719 0 35 2.312 35 5.375V26z"/><path fill="#CCD6DD" d="M33 30c0 2.209-1.791 4-4 4H7c-2.209 0-4-1.791-4-4V6c0-4.119-.021-4 5-4h21c2.209 0 4 1.791 4 4v24z"/><path fill="#E1E8ED" d="M31 31c0 1.657-1.343 3-3 3H4c-1.657 0-3-1.343-3-3V7c0-1.657 1.343-3 3-3h24c1.657 0 3 1.343 3 3v24z"/><path fill="#3B88C3" d="M31 32c0 2.209-1.791 4-4 4H6c-2.209 0-4-1.791-4-4V10c0-2.209 1.791-4 4-4h21c2.209 0 4 1.791 4 4v22z"/><path fill="#55ACEE" d="M29 32c0 2.209-1.791 4-4 4H6c-2.209 0-4-1.791-4-4V12c0-2.209 1.791-4 4-4h19.335C27.544 8 29 9.456 29 11.665V32z"/><path fill="#269" d="M6 6C4.312 6 4.269 4.078 5 3.25 5.832 2.309 7.125 2 9.438 2H11V0H8.281C4.312 0 1 2.5 1 5.375V32c0 2.209 1.791 4 4 4h2V6H6z"/></g></svg>AltText: book bluePlacement: before-question
- VisualToken
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Use the clues to find the mystery number.
Show answer
Answer: 2
- Clues
- If you double me, you get 4.
- AnswerRange
- 1
- 20
- Visual
- Type: inline-svgSvg: <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 44 44" width="44" height="44"><g transform="translate(4,4) scale(1)"><path fill="#FFCC4D" d="M30.021 34.264c-1.563 1.563-4.095 1.562-5.656 0L1.736 11.636c-1.562-1.562-1.563-4.094 0-5.657l4.243-4.242c1.562-1.562 4.095-1.562 5.657 0l22.626 22.628c1.562 1.562 1.562 4.096.001 5.656l-4.242 4.243z"/><path fill="#292F33" d="M9.515 6.687c-.391.39-1.023.39-1.414 0-.39-.391-.39-1.024 0-1.415l3.536-3.536 1.414 1.415-3.536 3.536zm5.656 1.414c-.39.391-1.024.391-1.414 0-.391-.391-.391-1.024 0-1.414l1.415-1.415 1.414 1.415-1.415 1.414zm1.415 5.656c-.391.391-1.024.391-1.414 0-.39-.391-.39-1.024 0-1.414l3.536-3.536c.486.486.929.928 1.414 1.415l-3.536 3.535zm5.656 1.414c-.39.391-1.023.391-1.413 0-.392-.391-.391-1.024 0-1.414l1.414-1.415c.485.487.928.928 1.414 1.415l-1.415 1.414zm1.415 5.657c-.391.391-1.023.392-1.414 0-.391-.391-.391-1.023-.001-1.414l3.536-3.535 1.414 1.414-3.535 3.535zm7.071 7.071c-.39.391-1.023.391-1.413 0-.392-.391-.392-1.023-.001-1.414l3.536-3.535 1.414 1.414-3.536 3.535zm-1.415-5.657c-.391.391-1.022.391-1.414.001-.391-.391-.39-1.024 0-1.414l1.415-1.414 1.413 1.413-1.414 1.414z"/></g></svg>AltText: rulerPlacement: before-question
- VisualToken
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Use the clues to find the mystery number.
Show answer
Answer: 10
- Clues
- I am not a multiple of 3.
- I am a multiple of 2.
- Half of me is 5.
- AnswerRange
- 1
- 20
- Visual
- Type: inline-svgSvg: <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 44 44" width="44" height="44"><g transform="translate(4,4) scale(1)"><path fill="#DD2E44" d="M35.702 7.477L28.522.298c-.396-.397-1.038-.397-1.436 0L3.395 23.989c-.397.397-.397 1.038 0 1.437.72.719-3.14 7.959-3.395 8.496L2.068 36c.536-.255 7.785-4.115 8.506-3.395.397.397 1.039.397 1.436 0L35.702 8.913c.397-.396.397-1.039 0-1.436z"/><path fill="#EA596E" d="M4.139 23.24L26.407.972l8.62 8.62L12.759 31.86z"/><path fill="#292F33" d="M23.534 3.846l1.437-1.436 8.62 8.62-1.437 1.436zM5.576 21.803l1.436-1.437 8.62 8.62-1.437 1.437z"/><path fill="#BE1931" d="M26.886 9.353c-1.521-1.521-5.982.476-9.967 4.459-3.983 3.984-5.979 8.446-4.459 9.967 1.52 1.521 5.983-.476 9.967-4.459 3.983-3.984 5.979-8.447 4.459-9.967z"/></g></svg>AltText: crayonPlacement: before-question
- VisualToken
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Use the clues to find the mystery number.
Show answer
Answer: 7
- Clues
- I am not a multiple of 3.
- If you double me, you get 14.
- AnswerRange
- 1
- 20
- Visual
- Type: inline-svgSvg: <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 44 44" width="44" height="44"><g transform="translate(4,4) scale(1)"><path d="M11.946 27C-1.036 7.876 7.524 2.752 9.114 2c.149-.07.242-.105.245-.107.418-.209.638-.675.529-1.125C9.779.318 9.372 0 8.903 0H4.847C1.054 0-4.282 11 5.859 28c.151.253 5.073 0 5.073 0 .559 0 1.324-.541 1.014-1zM31.229 0h-4c-.462 0-.863.318-.971.768-.107.45.109.916.521 1.125.004.002.095.037.242.107 1.568.752 10.01 5.876-2.792 25-.307.459.448 1 1 1 0 0 4.854.253 5.002 0 10-17 4.739-28 .998-28z" fill="#C1694F"/><path d="M6.889 28.836l.004.01c-.064-.293 5.363-1.387 5.053-1.846C-1.036 7.876 7.524 2.752 9.114 2H4.845C1.053 2-3.268 13 6.889 28.836zM31.231 2h-4.21c1.568.752 10.01 5.876-2.792 25-.307.459 4.984 1.839 4.986 1.836C39.231 13 34.971 2 31.231 2z" fill="#662113"/><path fill="#C1694F" d="M9.916 8c-.561 0-1.015-.448-1.015-1 0-3.316-2.028-5-4.056-5-.47 0-.08-.782.029-1.232.11-.45.516-.768.985-.768h5.071c3.791 0 4.938 6.136 5.057 6.835.049.29-.034.586-.226.811-.195.225-.478.354-.775.354h-5.07zm16.315 0c.553 0 1-.448 1-1 0-3.316 2-5 4-5 .463 0 .078-.782-.029-1.232-.107-.45-.508-.768-.971-.768h-5c-3.738 0-4.869 6.136-4.986 6.835-.049.29.033.586.223.811.191.225.47.354.763.354h5z"/><path fill="#BE1931" d="M6 32s0 4 4 4h16s4 0 4-4V10s0-4-4-4H10c-4 0-4 4-4 4v22z"/><path fill="#A0041E" d="M24 28H12c-2.201 0-3-1.794-3-3V11c0-.552.448-1 1-1s1 .448 1 1v14c.012.45.195 1 1 1h12c.45-.012 1-.194 1-1V11c0-.552.447-1 1-1s1 .448 1 1v14c0 2.201-1.794 3-3 3z"/><path fill="#FFF" d="M16 25s0-1 1-1h2s1 0 1 1v5s0 1-1 1h-2s-1 0-1-1v-5z"/></g></svg>AltText: backpackPlacement: before-question
- VisualToken
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Use the clues to find the mystery number.
Show answer
Answer: 4
- Clues
- My ones digit is 4.
- If you double me, you get 8.
- AnswerRange
- 1
- 20
- Visual
- Type: inline-svgSvg: <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 44 44" width="44" height="44"><g transform="translate(4,4) scale(1)"><path fill="#269" d="M32 7H4c-2.209 0-4 1.791-4 4v15c0 2.209 1.791 4 4 4h11.416c.52.596 1.477 1 2.584 1s2.065-.404 2.584-1H32c2.209 0 4-1.791 4-4V11c0-2.209-1.791-4-4-4z"/><path fill="#292F33" d="M20 27c0 1.104-.896 2-2 2s-2-.896-2-2V9c0-1.104.896-2 2-2s2 .896 2 2v18z"/><path fill="#99AAB5" d="M18 26c0 1.104-.896 2-2 2H4c-1.104 0-2-.896-2-2V8c0-1.104.896-2 2-2h12c1.104 0 2 .896 2 2v18z"/><path fill="#E1E8ED" d="M18 26c-.999-1.998-3.657-2-4-2-2 0-5 2-8 2-1 0-2-.896-2-2V8c0-1.104 1-2 2-2 3.255 0 6-2 8-2 3 0 4 1.896 4 3v19z"/><path fill="#99AAB5" d="M34 26c0 1.104-.896 2-2 2H20c-1.104 0-2-.896-2-2V8c0-1.104.896-2 2-2h12c1.104 0 2 .896 2 2v18z"/><path fill="#CCD6DD" d="M18 26c.999-1.998 3.657-2 4-2 2 0 5 2 8 2 1 0 2-.896 2-2V8c0-1.104-1-2-2-2-3.256 0-6-2-8-2-3 0-4 1.896-4 3v19z"/></g></svg>AltText: book openPlacement: before-question
- VisualToken
- Type: asset-refEffectiveProvider: twemojiRequestedProvider: twemojiIconSize: 36Layout: icon-badgePlacement: before-questionItems: [{"ref":"twemoji:1f4d6","name":"book-open","count":1,"role":"badge"}]
Use the clues to find the mystery number.
Show answer
Answer: 5
- Clues
- I am a multiple of 5.
- If you double me, you get 10.
- AnswerRange
- 1
- 20
- Visual
- Type: inline-svgSvg: <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 44 44" width="44" height="44"><g transform="translate(4,4) scale(1)"><path fill="#D99E82" d="M35.222 33.598c-.647-2.101-1.705-6.059-2.325-7.566-.501-1.216-.969-2.438-1.544-3.014-.575-.575-1.553-.53-2.143.058 0 0-2.469 1.675-3.354 2.783-1.108.882-2.785 3.357-2.785 3.357-.59.59-.635 1.567-.06 2.143.576.575 1.798 1.043 3.015 1.544 1.506.62 5.465 1.676 7.566 2.325.359.11 1.74-1.271 1.63-1.63z"/><path fill="#EA596E" d="M13.643 5.308c1.151 1.151 1.151 3.016 0 4.167l-4.167 4.168c-1.151 1.15-3.018 1.15-4.167 0L1.141 9.475c-1.15-1.151-1.15-3.016 0-4.167l4.167-4.167c1.15-1.151 3.016-1.151 4.167 0l4.168 4.167z"/><path fill="#FFCC4D" d="M31.353 23.018l-4.17 4.17-4.163 4.165L7.392 15.726l8.335-8.334 15.626 15.626z"/><path fill="#292F33" d="M32.078 34.763s2.709 1.489 3.441.757c.732-.732-.765-3.435-.765-3.435s-2.566.048-2.676 2.678z"/><path fill="#CCD6DD" d="M2.183 10.517l8.335-8.335 5.208 5.209-8.334 8.335z"/><path fill="#99AAB5" d="M3.225 11.558l8.334-8.334 1.042 1.042L4.267 12.6zm2.083 2.086l8.335-8.335 1.042 1.042-8.335 8.334z"/></g></svg>AltText: pencilPlacement: before-question
- VisualToken
- Type: asset-refEffectiveProvider: twemojiRequestedProvider: twemojiIconSize: 36Layout: icon-badgePlacement: before-questionItems: [{"ref":"twemoji:270f","name":"pencil","count":1,"role":"badge"}]
Use the clues to find the mystery number.
Show answer
Answer: 3
- Clues
- I am not a multiple of 5.
- My ones digit is 3.
- If you double me, you get 6.
- AnswerRange
- 1
- 20
- Visual
- Type: inline-svgSvg: <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 44 44" width="44" height="44"><g transform="translate(4,4) scale(1)"><path fill="#9AAAB4" d="M27.388 24.642L24.56 27.47l-4.95-4.95 2.828-2.828z"/><path fill="#66757F" d="M34.683 29.11l-5.879-5.879c-.781-.781-2.047-.781-2.828 0l-2.828 2.828c-.781.781-.781 2.047 0 2.828l5.879 5.879c1.562 1.563 4.096 1.563 5.658 0 1.56-1.561 1.559-4.094-.002-5.656z"/><circle fill="#8899A6" cx="13.586" cy="13.669" r="13.5"/><circle fill="#BBDDF5" cx="13.586" cy="13.669" r="9.5"/></g></svg>AltText: magnifierPlacement: before-question
- VisualToken
- Type: asset-refEffectiveProvider: twemojiRequestedProvider: twemojiIconSize: 36Layout: icon-badgePlacement: before-questionItems: [{"ref":"twemoji:1f50d","name":"magnifier","count":1,"role":"badge"}]
Use the clues to find the mystery number.
Show answer
Answer: 5
- Clues
- If you double me, you get 10.
- AnswerRange
- 1
- 20
- Visual
- Type: inline-svgSvg: <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 44 44" width="44" height="44"><g transform="translate(4,4) scale(1)"><path fill="#269" d="M35 26c0 2.209-1.791 4-4 4H5c-2.209 0-4-1.791-4-4V6.313C1 4.104 6.791 0 9 0h20.625C32.719 0 35 2.312 35 5.375V26z"/><path fill="#CCD6DD" d="M33 30c0 2.209-1.791 4-4 4H7c-2.209 0-4-1.791-4-4V6c0-4.119-.021-4 5-4h21c2.209 0 4 1.791 4 4v24z"/><path fill="#E1E8ED" d="M31 31c0 1.657-1.343 3-3 3H4c-1.657 0-3-1.343-3-3V7c0-1.657 1.343-3 3-3h24c1.657 0 3 1.343 3 3v24z"/><path fill="#3B88C3" d="M31 32c0 2.209-1.791 4-4 4H6c-2.209 0-4-1.791-4-4V10c0-2.209 1.791-4 4-4h21c2.209 0 4 1.791 4 4v22z"/><path fill="#55ACEE" d="M29 32c0 2.209-1.791 4-4 4H6c-2.209 0-4-1.791-4-4V12c0-2.209 1.791-4 4-4h19.335C27.544 8 29 9.456 29 11.665V32z"/><path fill="#269" d="M6 6C4.312 6 4.269 4.078 5 3.25 5.832 2.309 7.125 2 9.438 2H11V0H8.281C4.312 0 1 2.5 1 5.375V32c0 2.209 1.791 4 4 4h2V6H6z"/></g></svg>AltText: book bluePlacement: before-question
- VisualToken
- Type: asset-refEffectiveProvider: twemojiRequestedProvider: twemojiIconSize: 36Layout: icon-badgePlacement: before-questionItems: [{"ref":"twemoji:1f4d8","name":"book-blue","count":1,"role":"badge"}]
Use the clues to find the mystery number.
Show answer
Answer: 17
- Clues
- My digits add up to 8.
- My tens digit is 1.
- AnswerRange
- 1
- 20
- Visual
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Use the clues to find the mystery number.
Show answer
Answer: 18
- Clues
- I am not a multiple of 5.
- I am greater than 17.
- My digits add up to 9.
- AnswerRange
- 1
- 20
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Teaching Notes
Practice number detective with free printable worksheets. Uniquely generated — reinforce key math skills with every set.
Frequently Asked Questions
How do I use this Number Detective Easy Worksheets worksheet?
Print the worksheet and complete the problems. Each set number generates a unique arrangement. Use the same set number for all students in a class for consistent assessment.
Is there an answer key?
Yes — every worksheet includes a complete answer key. Print it separately or view it on screen.