Problem 3 · 2019 Math Kangaroo
Easy
Arithmetic & Operations
work-backward
Mother kangaroo and her son Max together weigh 60 kg. The mother on her own weighs 52 kg. How heavy is Max?
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Answer: B — 8 kg
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Hint 1 of 2
The two of them together make 60 kg, and the mother is part of that.
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Hint 2 of 2
Take the mother's weight away from the total to find Max.
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Approach: subtract the mother's weight from the combined weight
- Together mother and Max weigh 60 kg.
- The mother alone is 52 kg, so Max is what is left: 60 − 52.
- 60 − 52 = 8, so Max weighs 8 kg.
- The answer is B.
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