Problem 8 · 2015 Math Kangaroo
Medium
Counting & Probability
careful-counting
How many numbers are outside the square?
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Answer: E — 2
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Hint 1 of 2
The square holds some of the numbers; the rest are outside it.
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Hint 2 of 2
Count only the numbers that are NOT inside the square.
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Approach: count the numbers that lie outside the square
- Draw a finger around the edge of the square: numbers touching the inside are 'in', the rest are 'out'.
- Point at each number outside the square and count them.
- Exactly 2 numbers sit outside the square, choice E.
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