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2025 Math Kangaroo

Problem 9

Problem 9 · 2025 Math Kangaroo Medium
Arithmetic & Operations work-backward

Jan puts 12 pieces of fruit on a table. Vera takes away 2 pears, 4 apples and half of the oranges. Now there are only oranges on the table. How many oranges are left?

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Answer: C — 3
Show hints
Hint 1 of 3
The 12 pieces are pears, apples and oranges all together.
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Hint 2 of 3
Take the pears and apples out of the 12 to see how many oranges there were.
Still stuck? Show hint 3 →
Hint 3 of 3
Vera kept only half the oranges, so split that number of oranges into two equal piles.
Show solution
Approach: find how many oranges there were, then keep half
  1. The 2 pears and 4 apples make 6 pieces that are not oranges.
  2. Take those 6 away from 12 and you are left with 6 oranges to start.
  3. Vera took half the oranges away, so half of 6 stays: 3 oranges are left. The answer is C.
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