πagarwalmath · 3rd grade · Common Core MP.1
🚀 Challenge puzzles
Make sense of problems and keep at them (puzzles that need thinking, not a known method)
Name: ______________________Date: ____________
1I think of a number. I multiply it by 2, then add 7. Now I have 13. What number did I start with?
Answer: ______________
2Every row, column, and diagonal makes 15. What number goes in the middle right box?
Answer: ______________
3Every row, column, and diagonal makes 15. What number goes in the bottom middle box?
Answer: ______________
4I think of a number. I multiply it by 3, then add 1. Now I have 10. What number did I start with?
Answer: ______________
5Every row, column, and diagonal makes 15. What number goes in the middle left box?
Answer: ______________
6I think of a number. I multiply it by 5, then add 5. Now I have 25. What number did I start with?
Answer: ______________
7I think of a number. I multiply it by 3, then add 7. Now I have 25. What number did I start with?
Answer: ______________
8I think of a number. I multiply it by 3, then add 4. Now I have 13. What number did I start with?
Answer: ______________
9The scale balances. How much does one 🍌 weigh?
Answer: ______________
10I think of a number. I multiply it by 5, then add 8. Now I have 53. What number did I start with?
Answer: ______________
11I think of a number. I multiply it by 4, then add 4. Now I have 28. What number did I start with?
Answer: ______________
12I think of a number. I multiply it by 5, then add 5. Now I have 35. What number did I start with?
Answer: ______________
Answer key: Challenge puzzles
- 1. 3
- 2. 1
- 3. 9
- 4. 3
- 5. 9
- 6. 4
- 7. 6
- 8. 3
- 9. 2
- 10. 9
- 11. 6
- 12. 6
Practice this lesson online with games that adjust to your child: agarwalmath.com/math/3rd-grade/challenge-3