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Which of these is irrational?

A0
B22/7
C√3
D-15
Answer & Solution
Correct answer: C. √3
√3 ≈ 1.732... is non-terminating, non-repeating — irrational. **The others are all rational:** 0 = 0/1, 22/7 is a fraction, -15 is an integer.
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