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: ____________
13 friends meet. Each friend shakes hands with every other friend once. How many handshakes are there?
Answer: ______________ handshakes
24 friends meet. Each friend shakes hands with every other friend once. How many handshakes are there?
Answer: ______________ handshakes
3Every row, column, and diagonal makes 15. What number goes in the top right box?
Answer: ______________
4I think of a number. I multiply it by 2, then add 1. Now I have 7. What number did I start with?
Answer: ______________
5The scale balances. How much does one 🍎 weigh?
Answer: ______________
65 friends meet. Each friend shakes hands with every other friend once. How many handshakes are there?
Answer: ______________ handshakes
7I think of a number. I multiply it by 3, then add 3. Now I have 24. What number did I start with?
Answer: ______________
8The scale balances. How much does one 🍊 weigh?
Answer: ______________
9Every row, column, and diagonal makes 15. What number goes in the bottom middle box?
Answer: ______________
10Every row, column, and diagonal makes 15. What number goes in the top left box?
Answer: ______________
116 friends meet. Each friend shakes hands with every other friend once. How many handshakes are there?
Answer: ______________ handshakes
12I think of a number. I multiply it by 2, then add 3. Now I have 13. What number did I start with?
Answer: ______________
Answer key: Challenge puzzles
- 1. 3 handshakes
- 2. 6 handshakes
- 3. 6
- 4. 3
- 5. 8
- 6. 10 handshakes
- 7. 7
- 8. 8
- 9. 1
- 10. 8
- 11. 15 handshakes
- 12. 5
Practice this lesson online with games that adjust to your child: agarwalmath.com/math/3rd-grade/challenge-3