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: ____________
15 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
33 friends meet. Each friend shakes hands with every other friend once. How many handshakes are there?
Answer: ______________ handshakes
46 friends meet. Each friend shakes hands with every other friend once. How many handshakes are there?
Answer: ______________ handshakes
5I think of a number. I multiply it by 2, then add 4. Now I have 18. What number did I start with?
Answer: ______________
6I think of a number. I multiply it by 2, then add 8. Now I have 22. What number did I start with?
Answer: ______________
7The scale balances. How much does one 🍎 weigh?
Answer: ______________
8The scale balances. How much does one 🍊 weigh?
Answer: ______________
9The scale balances. How much does one 🍌 weigh?
Answer: ______________
10The scale balances. How much does one 🍌 weigh?
Answer: ______________
11I think of a number. I multiply it by 5, then add 2. Now I have 27. What number did I start with?
Answer: ______________
12I think of a number. I multiply it by 5, then add 7. Now I have 27. What number did I start with?
Answer: ______________
Answer key: Challenge puzzles
- 1. 10 handshakes
- 2. 6 handshakes
- 3. 3 handshakes
- 4. 15 handshakes
- 5. 7
- 6. 7
- 7. 6
- 8. 8
- 9. 9
- 10. 7
- 11. 5
- 12. 4
Practice this lesson online with games that adjust to your child: agarwalmath.com/math/3rd-grade/challenge-3