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2017 Math Kangaroo

Problem 1

Problem 1 · 2017 Math Kangaroo Easy
Spatial & Visual Reasoning spatial-reasoning

Ellen wants to decorate the butterfly using these 6 stickers. Which butterfly can she make? (The five butterflies are shown as choices A, B, C, D, E.)

Figure for Math Kangaroo 2017 Problem 1
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Answer: A
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Hint 1 of 2
Count how many stickers there are of each colour.
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Hint 2 of 2
Find the butterfly whose spots match the stickers colour for colour.
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Approach: match the stickers to the butterfly's spots
  1. Look at Ellen's 6 stickers and count how many there are of each colour.
  2. The right butterfly has spots that use exactly those colours, with the same number of each.
  3. Go through the butterflies one at a time and compare their spots to the stickers.
  4. Only butterfly A uses exactly the 6 stickers Ellen has.
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