Practice30Create account

Manish writes: 'Whole numbers are closed under subtraction.'
Give a single example that proves him wrong using whole numbers, and note that rational numbers do not have this problem.

Class 8Properties of Rational NumbersRational Numbers
  • A3 - 5 = -2 is not a whole number, so wholes are not closed; rationals are closed
  • B3 - 5 = 2 so wholes are closed
  • C5 - 3 = 2 so wholes are closed
  • D3 - 5 = -2 and rationals are also not closed

Step-by-Step Solution

3 - 5 = -2, which is not a whole number, so whole numbers are not closed under subtraction. Rationals (which include negatives) are closed under subtraction.
Answer: A) 3 - 5 = -2 is not a whole number, so wholes are not closed; rationals are closed

Master this chapter in 30 minutes a day.

Don't just memorise the answer — build a daily practice habit.

Practice 5 Similar Questions Free →

All Properties of Rational Numbers practice questions

More Class 8 Properties of Rational Numbers practice

A pizza is cut into equal slices. Priya colours 3/8 of the pizza red and 3/8 blue. Using…Kabir checks whether division is associative. He computes (12 / 6) / 2 and 12 / (6 / 2).…Lata is told: 'Every integer is a rational number, and integers are closed under…Simplify smartly using properties: 7/15 × 9/14 × 15/7. Rearrange the factors…Ravi states: 'For any two rationals a and b, a x b = b x a, but a - b is not equal to b…