Question

Given that $Q$ is a rational number:

(i) Difference of two $Q$s is $Q$.

(ii) Subtraction is commutative on $Q$.

(iii) Addition is not commutative on $Q$.

Which option is wrong?

• A. (ii) and (iii)
• B. (i) only
• C. (i) and (iii)
• D. All the above

Answer 1

Answer: (A)

(ii) and (iii)

Difference of two rational number will be rational number.

Commutative property applies only on addition and multiplication.

So (i) is correct but (ii) and (iii) are wrong

So correct answer will be option A