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: ____________
16 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 bottom left box?
Answer: ______________
45 friends meet. Each friend shakes hands with every other friend once. How many handshakes are there?
Answer: ______________ handshakes
5Every row, column, and diagonal makes 15. What number goes in the bottom left box?
Answer: ______________
6Every row, column, and diagonal makes 15. What number goes in the top middle box?
Answer: ______________
73 friends meet. Each friend shakes hands with every other friend once. How many handshakes are there?
Answer: ______________ handshakes
8Every row, column, and diagonal makes 15. What number goes in the bottom middle box?
Answer: ______________
9I think of a number. I multiply it by 5, then add 2. Now I have 32. What number did I start with?
Answer: ______________
10The scale balances. How much does one 🍎 weigh?
Answer: ______________
11I think of a number. I multiply it by 5, then add 4. Now I have 19. What number did I start with?
Answer: ______________
12Every row, column, and diagonal makes 15. What number goes in the middle left box?
Answer: ______________
Answer key: Challenge puzzles
- 1. 15 handshakes
- 2. 6 handshakes
- 3. 6
- 4. 10 handshakes
- 5. 4
- 6. 9
- 7. 3 handshakes
- 8. 1
- 9. 6
- 10. 2
- 11. 3
- 12. 7
Practice this lesson online with games that adjust to your child: agarwalmath.com/math/3rd-grade/challenge-3