Problem 7 · 2018 Math Kangaroo
Medium
Spatial & Visual Reasoning
path-tracing
To get to his bone, the dog must follow the black line. Along the way he turns 3 times to the right and 2 times to the left. Which path does he take?
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Answer: E
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Hint 1 of 3
Pretend you are the dog walking the line — turn your body at every bend.
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Hint 2 of 3
At each corner say out loud 'right' or 'left', the way the dog would turn while walking forward.
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Hint 3 of 3
Count the rights and the lefts for each path; you want exactly 3 rights and 2 lefts.
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Approach: walk along each path and count the turns
- Imagine walking forward along the line like the dog, facing the way you are going.
- At every corner, decide if you turn to your right or to your left, and keep a tally for each path.
- Only path E has exactly 3 right turns and 2 left turns.
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