number-system-integers-rationals-l2 MCQ — 10 Practice Questions with Answers

Explanation

Writing 7 as 7/1 proves it fits the rational-number form p/q. Imran should notice that the denominator is 1, not 0, so the expression is valid and keeps the same value.

Explanation

The assertion and reason are both correct. Zoya should compare negative numbers by their positions: the point farther left is smaller, so -5 is less than -2.

Explanation

A single counterexample is enough. The number 2/3 is rational because it has integer numerator and non-zero integer denominator, but it is not an integer. That makes option B false.

Explanation

Closure fails when even one valid operation on members of the set gives a result outside the set. Devika can use 1 divided by 2 because both inputs are integers but the result is not an integer.

Explanation

Whole numbers are 0 and the counting numbers. Integers extend that group by adding negative numbers. So Asha should see the integer set as larger, with every whole number already included inside it.