Question

Which of the following alternatives is wrong? Given that
(i) difference of two rational numbers is a rational number
(ii) subtraction is commutative on rational numbers
(iii) addition is not commutative on rational numbers.

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

Answer 1

The correct option is A (ii) and (iii)

1. When a rational number is multiplied, add or subtracted by any rational number, result is a rational number. For division, denominator must not be zero.

2. Commutative property is only followed by addition and multiplication.

Hence, statements (ii) and (iii) are wrong.