Problem 2 · 2016 Math Kangaroo
Medium
Arithmetic & Operations
estimate-and-pick
Which of the following numbers is closest to the number 17×0.3×20.16999?
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Answer: B — 0.1
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Hint 1 of 2
You only need a rough size, not the exact value.
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Hint 2 of 2
Round each factor and the denominator to easy numbers.
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Approach: estimation
- The top is about 17×0.3×20 ≈ 102.
- Dividing by about 1000 gives roughly 0.1.
- So the closest listed value is 0.1.
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