Problem 9 · 2017 Math Kangaroo
Easy
Arithmetic & Operations
total-then-divide
Yvonne has 20 €, and each of her four sisters has 10 €. How much does Yvonne have to give to each of her sisters so that all of them have the same amount of money?
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Answer: A — 2
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Hint 1 of 2
First find how much each person should have once the money is shared equally.
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Hint 2 of 2
Then see how much Yvonne must hand to each sister to reach that level.
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Approach: equalise the total
- Total money = 20 + 4×10 = 60 €, shared among 5 people = 12 € each.
- Yvonne must drop from 20 to 12, giving away 8 € over 4 sisters.
- That is 8 ÷ 4 = 2 € to each sister.
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