Q. 254.7( 3 Votes )

# Find the number of all positive integers of 3 digits which are divisible by 5.

The list of 3 digit numbers divisible by 5 is:

100, 105, 110,…,995

Here a = 100, d = 105 – 100 = 5, an = 995

We know that

an = a + (n – 1)d

995 = 100 + (n – 1)5

895 = (n – 1)5

179 = n – 1

180 = n

So, there are 180 three– digit numbers divisible by 5.

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