How many natural numbers are there between 23 and 100 which are exactly divisible by 6?

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OPSC ASO (Maths & Reasoning) 27 Aug 2022 Official Paper
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  1. 8
  2. 11
  3. 13
  4. 12

Answer (Detailed Solution Below)

Option 3 : 13
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Detailed Solution

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Given:

Natural numbers between 23 and 100.

These numbers need to be exactly divisible by 6.

Formula Used:

For numbers divisible by any number k in a range, the formula for the count is:

Count = (Largest number divisible by k - Smallest number divisible by k ) / k + 1

Calculation:

Smallest natural number divisible by 6 and greater than 23 is:

⇒ 24 (6 × 4 = 24)

Largest natural number divisible by 6 and less than 100 is:

⇒ 96 (6 × 16 = 96)

Count of numbers divisible by 6:

⇒ (96 - 24) / 6 + 1

⇒ 72 / 6 + 1

⇒ 12 + 1

⇒ 13

The number of natural numbers between 23 and 100 divisible by 6 is 13.

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