Question 49
Fractions, Decimals and ApproximationWhich of the following is not a rational number?
- A.−5
- B.√4
- C.3 3/4
- D.√90
Show the answer and explanation
Answer: D (√90)
Explanation
90 is not a perfect square, so √90 cannot be written as a fraction. √4 = 2 is rational.