Question

How many 3 digit numbers are divisible by 7?

Answer 1

First 3digit number divisible by 7=105, such that a=105

last 3 digit number divisible by 7=994, such that l=994

Therefore,a=105;l=994;d=7

We know that,

n=l-a/d +1

=994-105/7 +1

=889/7 +1

=127+1

=128

Therefore, 128 3-digit numbers are divisible by 7.

Answer 2

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ans is 128 and are you free to chat