Problem 7 · 2015 Math Kangaroo
Easy
Spatial & Visual Reasoning
path-tracingsequence-of-figures
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Answer: E
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Hint 1 of 2
Every line skips one point and lands on the next-but-one point.
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Hint 2 of 2
Keep hopping by 2 and check whether you touch all nine points before you come back to 1.
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Approach: trace the step-by-2 path through all nine points
- Start at 1 and keep hopping over one point: 1→3→5→7→9→2→4→6→8 and then back to 1.
- Counting along, this hopping touches every one of the nine points exactly once before closing up.
- Drawing all those lines makes one continuous nine-pointed star, which is picture E.
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