Workbook Detail
Number Detective Hard — Set 10
Use the clues to find the mystery number.
Show answer
Answer: 83
- Clues
- My tens digit is 8.
- If you double me, you get 166.
- AnswerRange
- 10
- 99
Use the clues to find the mystery number.
Show answer
Answer: 22
- Clues
- My digits add up to 4.
- I am less than 34.
- If you double me, you get 44.
- AnswerRange
- 10
- 99
Use the clues to find the mystery number.
Show answer
Answer: 94
- Clues
- Half of me is 47.
- AnswerRange
- 10
- 99
Use the clues to find the mystery number.
Show answer
Answer: 83
- Clues
- My digits add up to 11.
- My tens digit is 8.
- AnswerRange
- 10
- 99
Use the clues to find the mystery number.
Show answer
Answer: 62
- Clues
- I am a multiple of 2.
- My tens digit is 6.
- I am not a multiple of 3.
- My digits add up to 8.
- AnswerRange
- 10
- 99
Use the clues to find the mystery number.
Show answer
Answer: 23
- Clues
- My digits add up to 5.
- I am greater than 14.
- I am less than 38.
- My ones digit is 3.
- AnswerRange
- 10
- 99
Use the clues to find the mystery number.
Show answer
Answer: 30
- Clues
- I am an even number.
- If you double me, you get 60.
- AnswerRange
- 10
- 99
Use the clues to find the mystery number.
Show answer
Answer: 57
- Clues
- I am not a multiple of 2.
- I am greater than 51.
- My digits add up to 12.
- My ones digit is 7.
- AnswerRange
- 10
- 99
Use the clues to find the mystery number.
Show answer
Answer: 19
- Clues
- My digits add up to 10.
- I am less than 34.
- My ones digit is 9.
- 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="#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
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Use the clues to find the mystery number.
Show answer
Answer: 38
- Clues
- My digits add up to 11.
- Half of me is 19.
- AnswerRange
- 10
- 99
Use the clues to find the mystery number.
Show answer
Answer: 50
- Clues
- My ones digit is 0.
- I am less than 57.
- I am not a multiple of 3.
- My tens digit is 5.
- AnswerRange
- 10
- 99
Use the clues to find the mystery number.
Show answer
Answer: 88
- Clues
- I am a multiple of 2.
- My tens digit is 8.
- My digits add up to 16.
- AnswerRange
- 10
- 99
Use the clues to find the mystery number.
Show answer
Answer: 75
- Clues
- My digits add up to 12.
- I am less than 83.
- I am greater than 73.
- AnswerRange
- 10
- 99
Use the clues to find the mystery number.
Show answer
Answer: 20
- Clues
- If you double me, you get 40.
- 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="#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
- VisualToken
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Use the clues to find the mystery number.
Show answer
Answer: 46
- Clues
- My ones digit is 6.
- My tens digit is 4.
- AnswerRange
- 10
- 99
Use the clues to find the mystery number.
Show answer
Answer: 73
- Clues
- I am greater than 63.
- I am less than 84.
- My ones digit is 3.
- If you double me, you get 146.
- AnswerRange
- 10
- 99
Use the clues to find the mystery number.
Show answer
Answer: 96
- Clues
- I am a multiple of 3.
- I am greater than 85.
- I am not a multiple of 5.
- My digits add up to 15.
- I am an even number.
- AnswerRange
- 10
- 99
Use the clues to find the mystery number.
Show answer
Answer: 95
- Clues
- I am an odd number.
- I am greater than 80.
- My tens digit is 9.
- My ones digit is 5.
- AnswerRange
- 10
- 99
Use the clues to find the mystery number.
Show answer
Answer: 34
- Clues
- Half of me is 17.
- AnswerRange
- 10
- 99
Use the clues to find the mystery number.
Show answer
Answer: 47
- Clues
- I am greater than 44.
- My digits add up to 11.
- My ones digit is 7.
- 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.