Problem 20 · 2025 Math Kangaroo
Stretch
Arithmetic & Operations
sum-constrainttotal-then-divide
Jana writes down how much her toys weigh: 22 g, 23 g, 25 g, 34 g and 36 g. She wants to share all her toys into two boxes so that both boxes weigh the same. Which two toys do not go in the same box?
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Answer: C
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Hint 1 of 2
Add all five weights and split into two equal boxes.
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Hint 2 of 2
Find which toys sum to half the total; the two that land in different boxes are your answer.
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Approach: split the weights into two equal halves
- The weights 22, 23, 25, 34, 36 add to 140 g, so each box holds 70 g.
- One box is 22 + 23 + 25 = 70 (balloon, car, boat); the other is 34 + 36 = 70 (helicopter, plane).
- So the balloon and the plane end up in different boxes.
- That pairing is option C.
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