Which statement is CORRECT about whole numbers?

Class 6Whole NumbersWhole Numbers

AThere is a largest whole number
BThere is a smallest whole number, and it is 0
CEvery whole number has a predecessor
D0 is a natural number

Step-by-Step Solution

Whole numbers start at 0 and never end, so 0 is the smallest and there is no largest. 0 has no predecessor, and 0 is not a natural number. Only the second statement is correct.

Answer: B) There is a smallest whole number, and it is 0

Key idea: Closure: when an operation 'stays inside' the whole numbers

Adding two whole numbers always gives a whole number — addition is **closed** on whole numbers. Multiplying two whole numbers always gives a whole number — multiplication is **closed** too. But subtraction is **not** closed: 5 − 7 = −2, which is not a whole number. Division is also not closed: 7 ÷ 2 = 3.5, not a whole number. Closure is the property that lets us trust an operation never to take us 'outside' the world of whole numbers.

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