Problem 15 · 2022 Math Kangaroo
Stretch
Arithmetic & Operations
careful-counting
The three zebras Runa, Zara and Biba take part in a competition. The winner is the zebra with the most stripes. Runa has 15 stripes. Zara has 3 stripes more than Runa. Runa has 5 stripes less than Biba. How many stripes does the winner have?
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Answer: C — 20
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Hint 1 of 2
Work out each zebra's stripe count from Runa's 15.
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Hint 2 of 2
The winner has the most stripes - compare all three.
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Approach: compute each total and take the largest
- Runa has 15. Zara has 15 + 3 = 18. Biba has 15 + 5 = 20.
- Biba has the most stripes.
- So the winner has 20 stripes.
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