🦘 Math Kangaroo Grade All Felix 1-2 Ecolier 3-4 Benjamin 5-6 Kadett 7-8 Junior 9-10 Student 11-12 ⇄ switch contest
2020 Math Kangaroo

Problem 9

Problem 9 · 2020 Math Kangaroo Medium
Spatial & Visual Reasoning tiling-tessellationspatial-reasoning
Figure for Math Kangaroo 2020 Problem 9
Show answer
Answer: E
Show hints
Hint 1 of 2
Every tile in the wall is just one corner piece rotated; find the odd one out.
Still stuck? Show hint 2 →
Hint 2 of 2
Compare each option's colours and shapes to the repeating tile in the wall.
Show solution
Approach: match each tile to a rotation of the wall's unit
  1. The wall is built from one tile repeated and rotated.
  2. Four of the options are rotations of that tile.
  3. Option E has a pattern that no rotation of the wall tile produces.
  4. So E is NOT part of the wall.
Mark: · log in to save
↑