Problem 7 · 2014 Math Kangaroo
Medium
Spatial & Visual Reasoning
spatial-reasoning
The kangaroo is inside how many circles?
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Answer: C — 3
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Hint 1 of 3
A circle only counts if the kangaroo is sitting inside its round line, not outside it.
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Hint 2 of 3
Trace each circle's edge with your finger and ask: did I draw a loop around the kangaroo?
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Hint 3 of 3
Count one tally for every circle whose loop goes all the way around the kangaroo.
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Approach: check each circle one at a time and tally the ones that surround the kangaroo
- There are four circles, and they overlap, so the kangaroo can be inside more than one.
- Go around each circle's edge and check whether the kangaroo is inside that loop.
- Three of the circles wrap all the way around the kangaroo; the lowest circle does not.
- So the kangaroo is inside 3 circles.
Mark:
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