Question

Which of the following is not zero?

(a) 0 $\text{×}$ 0 (b) $\frac{\text{0}}{\text{2}}$ (c) $\frac{\left(\text{6-6}\right)}{\text{2}}$ (d) 4 + 0

Answer 1

In the product of two numbers, if one of the numbers (or both) is (are) zero, then the product is zero.
$\text{∴ 0×0=0}$
In a division, if the numerator is zero, then the answer is zero.
$\text{∴}\frac{\text{0}}{\text{2}}\text{=0}$
Similarly, $\frac{\left(\text{6-6}\right)}{\text{2}}=\frac{\text{0}}{\text{2}}\text{=0}$
Here, 0 is an additive identity in the set of whole numbers.
∴ 4 + 0 =4
Thus, 4 + 0 is not zero.
Hence, the correct option is (d).