Problem 7 · 2016 Math Kangaroo
Easy
Arithmetic & Operations
division
A centipede owns 25 pairs of shoes. He needs one shoe for every one of his 100 feet. How many more single shoes does the centipede still need to buy?
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Answer: D — 50
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Hint 1 of 2
First work out how many shoes the centipede needs in total, then how many it already has.
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Hint 2 of 2
Remember a pair means 2 shoes.
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Approach: subtract the shoes already owned from the shoes needed
- The centipede needs one shoe for each of its 100 feet, so 100 shoes in all.
- It already has 25 pairs, and each pair is 2 shoes, so \(25 \times 2 = 50\) shoes.
- It still needs \(100 - 50 = 50\) more shoes, choice (D).
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