Question

The number of numbers of 4 digits which are not divisible by 5 are

• A. 7200
• B. 3600
• C. 14400
• D. 1800

Answer 1

The correct option is A

7200

The total number of 4 digits are 9999-999=9000.

The numbers of 4 digits number divisible by 5 are $90\times 20$=1800. Hence required number of ways are 9000-1800 =7200.

{Since there are 20 numbers in each hundred (1 to 100) divisible by 5 and from 999 to 9999 there are 90 hundreds, hence the results}.