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 2. Now I have 20. What number did I start with?
Answer: ______________
23 friends meet. Each friend shakes hands with every other friend once. How many handshakes are there?
Answer: ______________ handshakes
36 friends meet. Each friend shakes hands with every other friend once. How many handshakes are there?
Answer: ______________ handshakes
45 friends meet. Each friend shakes hands with every other friend once. How many handshakes are there?
Answer: ______________ handshakes
54 friends meet. Each friend shakes hands with every other friend once. How many handshakes are there?
Answer: ______________ handshakes
6I think of a number. I multiply it by 2, then add 9. Now I have 15. What number did I start with?
Answer: ______________
7The scale balances. How much does one 🍊 weigh?
Answer: ______________
8I think of a number. I multiply it by 2, then add 9. Now I have 21. What number did I start with?
Answer: ______________
9I think of a number. I multiply it by 3, then add 3. Now I have 21. What number did I start with?
Answer: ______________
10The scale balances. How much does one 🍎 weigh?
Answer: ______________
11Every row, column, and diagonal makes 15. What number goes in the middle right box?
Answer: ______________
12The scale balances. How much does one 🍊 weigh?
Answer: ______________
Answer key: Challenge puzzles
- 1. 9
- 2. 3 handshakes
- 3. 15 handshakes
- 4. 10 handshakes
- 5. 6 handshakes
- 6. 3
- 7. 7
- 8. 6
- 9. 6
- 10. 2
- 11. 7
- 12. 3
Practice this lesson online with games that adjust to your child: agarwalmath.com/math/3rd-grade/challenge-3