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 3, then add 9. Now I have 36. What number did I start with?
Answer: ______________
2I think of a number. I multiply it by 2, then add 2. Now I have 18. What number did I start with?
Answer: ______________
3The scale balances. How much does one 🍎 weigh?
Answer: ______________
4I think of a number. I multiply it by 3, then add 8. Now I have 26. What number did I start with?
Answer: ______________
5I think of a number. I multiply it by 5, then add 3. Now I have 43. What number did I start with?
Answer: ______________
6I think of a number. I multiply it by 2, then add 4. Now I have 8. What number did I start with?
Answer: ______________
7I think of a number. I multiply it by 3, then add 2. Now I have 26. What number did I start with?
Answer: ______________
8I think of a number. I multiply it by 4, then add 6. Now I have 30. What number did I start with?
Answer: ______________
9I think of a number. I multiply it by 3, then add 9. Now I have 30. What number did I start with?
Answer: ______________
10I think of a number. I multiply it by 4, then add 9. Now I have 29. What number did I start with?
Answer: ______________
11I think of a number. I multiply it by 2, then add 5. Now I have 13. What number did I start with?
Answer: ______________
12I think of a number. I multiply it by 2, then add 1. Now I have 13. What number did I start with?
Answer: ______________
Answer key: Challenge puzzles
- 1. 9
- 2. 8
- 3. 3
- 4. 6
- 5. 8
- 6. 2
- 7. 8
- 8. 6
- 9. 7
- 10. 5
- 11. 4
- 12. 6
Practice this lesson online with games that adjust to your child: agarwalmath.com/math/3rd-grade/challenge-3