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January 2018
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Problem:
Which of the following is a rational number?
\[\sqrt2\]
\[\sqrt{\pi}\]
\[\sqrt7\]
\[\frac{\sqrt{5}}{\sqrt{25}}\]
\[\frac{\sqrt{64}}{\sqrt{49}}\]
Answer: E
A rational number is a number that can be written as a ratio. That means it can be written as a fraction, in which both the numerator (the number on top) and the denominator (the number on the bottom) are whole numbers.
Only E meets the definition, because the answer is 8/7.
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