Workbook Detail
Number Detective Hard — Set 7
Use the clues to find the mystery number.
Show answer
Answer: 89
- Clues
- I am not a multiple of 3.
- My digits add up to 17.
- My tens digit is 8.
- AnswerRange
- 10
- 99
Use the clues to find the mystery number.
Show answer
Answer: 33
- Clues
- My digits add up to 6.
- I am greater than 20.
- My ones digit is 3.
- AnswerRange
- 10
- 99
Use the clues to find the mystery number.
Show answer
Answer: 83
- Clues
- My ones digit is 3.
- I am less than 89.
- My digits add up to 11.
- AnswerRange
- 10
- 99
Use the clues to find the mystery number.
Show answer
Answer: 10
- Clues
- My tens digit is 1.
- I am a multiple of 5.
- Half of me is 5.
- AnswerRange
- 10
- 99
- 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
- VisualToken
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Use the clues to find the mystery number.
Show answer
Answer: 86
- Clues
- I am not a multiple of 3.
- My tens digit is 8.
- My digits add up to 14.
- AnswerRange
- 10
- 99
Use the clues to find the mystery number.
Show answer
Answer: 32
- Clues
- My ones digit is 2.
- My digits add up to 5.
- AnswerRange
- 10
- 99
Use the clues to find the mystery number.
Show answer
Answer: 52
- Clues
- I am not a multiple of 3.
- Half of me is 26.
- AnswerRange
- 10
- 99
Use the clues to find the mystery number.
Show answer
Answer: 84
- Clues
- I am greater than 78.
- I am an even number.
- I am not a multiple of 5.
- If you double me, you get 168.
- AnswerRange
- 10
- 99
Use the clues to find the mystery number.
Show answer
Answer: 76
- Clues
- I am greater than 64.
- If you double me, you get 152.
- AnswerRange
- 10
- 99
Use the clues to find the mystery number.
Show answer
Answer: 40
- Clues
- I am an even number.
- My digits add up to 4.
- Half of me is 20.
- AnswerRange
- 10
- 99
Use the clues to find the mystery number.
Show answer
Answer: 16
- Clues
- Half of me is 8.
- AnswerRange
- 10
- 99
- 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="#BE1931" d="M23.651 23.297L12.702 12.348l9.386-7.821 9.385 9.385z"/><path fill="#DD2E44" d="M34.6 13.912c-1.727 1.729-4.528 1.729-6.255 0l-6.257-6.256c-1.729-1.727-1.729-4.53 0-6.258 1.726-1.727 4.528-1.727 6.257 0L34.6 7.656c1.728 1.727 1.728 4.529 0 6.256z"/><path fill="#99AAB5" d="M14 17.823S-.593 35.029.188 35.813C.97 36.596 18.177 22 18.177 22L14 17.823z"/><path fill="#DD2E44" d="M25.215 27.991c-1.726 1.729-4.528 1.729-6.258 0L8.009 17.041c-1.727-1.728-1.727-4.528 0-6.256 1.728-1.729 4.53-1.729 6.258 0l10.948 10.949c1.728 1.729 1.728 4.528 0 6.257z"/></g></svg>AltText: pushpinPlacement: before-question
- VisualToken
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Use the clues to find the mystery number.
Show answer
Answer: 32
- Clues
- If you double me, you get 64.
- AnswerRange
- 10
- 99
Use the clues to find the mystery number.
Show answer
Answer: 37
- Clues
- My tens digit is 3.
- If you double me, you get 74.
- AnswerRange
- 10
- 99
Use the clues to find the mystery number.
Show answer
Answer: 32
- Clues
- My tens digit is 3.
- If you double me, you get 64.
- AnswerRange
- 10
- 99
Use the clues to find the mystery number.
Show answer
Answer: 42
- Clues
- I am greater than 41.
- I am not a multiple of 5.
- I am a multiple of 2.
- If you double me, you get 84.
- AnswerRange
- 10
- 99
Use the clues to find the mystery number.
Show answer
Answer: 98
- Clues
- My tens digit is 9.
- My ones digit is 8.
- AnswerRange
- 10
- 99
Use the clues to find the mystery number.
Show answer
Answer: 12
- Clues
- I am an even number.
- I am a multiple of 4.
- If you double me, you get 24.
- AnswerRange
- 10
- 99
- 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
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Use the clues to find the mystery number.
Show answer
Answer: 56
- Clues
- My digits add up to 11.
- Half of me is 28.
- AnswerRange
- 10
- 99
Use the clues to find the mystery number.
Show answer
Answer: 79
- Clues
- If you double me, you get 158.
- AnswerRange
- 10
- 99
Use the clues to find the mystery number.
Show answer
Answer: 82
- Clues
- My digits add up to 10.
- Half of me is 41.
- AnswerRange
- 10
- 99
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 Hard 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.