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BEBRAS 2021 Grade 7-8 Round 2 Ext Question 6

BEBRAS · BEBRAS 2021 Grade 7-8 Round 2 Ext

Question 6

Kangaroo wants to reach home at the bottom-right corner. It can travel horizontally or vertically along the drawn roads, and can cross a rock pile only if it contains at most two rocks. One segment joins two neighboring junctions.

Question illustration

What is the minimum number of segments needed to reach home?
  1. 12
  2. 17
  3. 14
  4. 20