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
2I think of a number. I multiply it by 2, then add 6. Now I have 12. What number did I start with?
Answer: ______________
33 friends meet. Each friend shakes hands with every other friend once. How many handshakes are there?
Answer: ______________ handshakes
44 friends meet. Each friend shakes hands with every other friend once. How many handshakes are there?
Answer: ______________ handshakes
55 friends meet. Each friend shakes hands with every other friend once. How many handshakes are there?
Answer: ______________ handshakes
6Every row, column, and diagonal makes 15. What number goes in the middle right box?
Answer: ______________
7I think of a number. I multiply it by 2, then add 8. Now I have 22. What number did I start with?
Answer: ______________
8I think of a number. I multiply it by 5, then add 9. Now I have 54. What number did I start with?
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 bottom left box?
Answer: ______________
11The scale balances. How much does one 🍌 weigh?
Answer: ______________
12Every row, column, and diagonal makes 15. What number goes in the middle right box?
Answer: ______________
Answer key: Challenge puzzles
- 1. 15 handshakes
- 2. 3
- 3. 3 handshakes
- 4. 6 handshakes
- 5. 10 handshakes
- 6. 9
- 7. 7
- 8. 9
- 9. 9
- 10. 4
- 11. 4
- 12. 3
Practice this lesson online with games that adjust to your child: agarwalmath.com/math/3rd-grade/challenge-3