Question

Which of these is not a rational number and why? [2 MARKS]

$\frac{3}{9},\frac{-4}{11},\sqrt{2},\pi$

Answer 1

Answer: 1 Mark
Reason: 1 Mark

A rational number is one which has an integer as its numerator and denominator but the denominator cannot be equal to zero. Hence, the rational numbers here are: $\frac{3}{9},\frac{-4}{11}$

As the numbers $\sqrt{2},\pi$ cannot be written in simple fractions therefore thay are irrational ( Note: $\pi =\frac{22}{7}$ is a popular approximation, but it is not accurate.)