93.6k views
3 votes
How many 4-digit numbers divisible by 5, all of the digits of which are odd, are there?

User Mechkov
by
5.1k points

1 Answer

4 votes

Answer: 125

Explanation:

For any number to be divisible by 5 it must end in either 0 or 5, thus for a 4 digit odd number it should end with 5 eg.1005,1015,1055 etc.

The exact number of 4 digit odd nos divisible by 5 can be calculated by using Principle of counting:

Therefore, no of possible numbers are: 5x5x5x1=125 numbers

User Albert Chen
by
5.2k points
Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.