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2021 Math Kangaroo

Problem 3

Problem 3 · 2021 Math Kangaroo Easy
Spatial & Visual Reasoning path-tracing

Which of the paths shown in the pictures is the longest?

Figure for Math Kangaroo 2021 Problem 3
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Answer: A
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Hint 1 of 3
Each path is drawn on the same grid of little squares.
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Hint 2 of 3
Count how many little square-sides each path is made of.
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Hint 3 of 3
The path that uses the most square-sides is the longest.
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Approach: count the little square-sides of each path
  1. Trace each path and count how many little square-sides it walks along.
  2. The more square-sides a path uses, the longer it is.
  3. Path A uses the most square-sides, so it is the longest.
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