Question

Mark the correct alternative in each of the following:

Which of the following is not zero?

(a) 0 × 0 (b) $\frac{0}{3}$ (c) $\frac{7-7}{3}$ (d) 9 ÷ 0

Answer 1

If any number is multiplied by 0, the product is 0.

∴ 0 × 0 = 0

If 0 is divided by any number (≠ 0), the quotient is always 0.

∴ $\frac{0}{3}=0$ and $\frac{7-7}{3}=\frac{0}{3}=0$

Division of any number by 0 is meaningless and is not defined.

∴ 9 ÷ 0 is not defined.

Hence, the correct answer is option (d).