- A200
- B100
- C90
- D110
Step-by-Step Solution
The whole numbers strictly between 99 and 200 are 100 to 199. Count = 199 - 100 + 1 = 100.
Answer: B) 100
How many whole numbers are there between 99 and 200 (both excluded)?
Class 6Whole NumbersWhole Numbers
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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