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In Number sequece questions, you are given a long series of numbers. It is required to find out how many times a number satisfying conditions, specified in the questions, occurs.

How many numbers from 1 to 100 are there each of which is not exactly divisible by 4 but also has 4 as a digit ?

Option:
A. 7
B. 10
C. 20
D. 21
E. More than 21
Answer: A . 7

Justification:

The numbers from 1 to 100 which are exactly divisible by 4 are 4, 8, 12, 16, 20, 24, 28, 32, 36, 40, 44, 48, 52, 56, 60, 64, 68, 72, 76, 80, 84, 88, 92, 96, 100.
But each number should have 4 as its digit.
.'. The required numbers are 4, 24, 40, 44, 48, 64, 84. Clearly, there are 7 such numbers.

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