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2020 Math Kangaroo

Problem 11

Problem 11 · 2020 Math Kangaroo Medium
Spatial & Visual Reasoning cube-viewscareful-counting
Figure for Math Kangaroo 2020 Problem 11
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Answer: A
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Hint 1 of 2
Count the small cubes in each shape, including ones hidden behind others.
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Hint 2 of 2
Pick the shape that uses the fewest cubes.
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Approach: count cubes in each solid
  1. Count the unit cubes that make up each of the five blocks.
  2. Be careful to include cubes hidden at the back or bottom.
  3. Block A uses the smallest number of cubes.
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