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BEBRAS 2019 Grade 3-4 Round 2 Ext Question 8

BEBRAS · BEBRAS 2019 Grade 3-4 Round 2 Ext

Question 8

A beaver has the shape-making machine shown below. Each conversion gate changes only its indicated input shape. For example, the illustrated gate changes a triangle to a circle; a circle or square passes unchanged.

Question illustration



Question illustration

How can the beaver get a square at the exit?
  1. Put a circle into input 1
  2. Put a circle into input 2
  3. Put a triangle into input 2
  4. Put a triangle into input 3