Multiple Choice Question (MCQ)
Which one of the following is not a rational number
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✓
\sqrt{3}
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×
0
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×
\sqrt{4}
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×
- \sqrt{16}
Answer
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Square root of a prime number is always irrational, so \sqrt{3} is not a rational number
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0 is a rational number because it can be expressed in a fraction of zero norminator and a non-zero denominator.
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Square root of a perfect square results in an integer, \sqrt{4} =2 , so \sqrt{4} is rational.
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- \sqrt{16} =-4
The same explanation as above