Lessons

General Aptitude
9.1 Numbers - General Questions

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Q.

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

View Answer

Correct choice: D

Explanation:

Required numbers are 24, 30, 36, 42, ..., 96

This is an A.P. in which a = 24, d = 6 and l = 96

Let the number of terms in it be n.

Then tn = 96 ⇒  a + (n - 1)d = 96

⇒ 24 + (n - 1) x 6 = 96

⇒ (n - 1) x 6 = 72

⇒ (n - 1) = 12

n = 13

Required number of numbers = 13.

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