Question

how mamy three digit numbers are divisible by 7​

Answer 1

We get 5 as the remainder. We subtract 5 from 999 to get l. Thus there are 128 3-digit numbers divisible by 7. Therefore total 3 digit number divisible by 7 are 256.

Answer 2

Step-by-step explanation:

The list of the three digit numbers divisible by 7:

105, 112, 119, 126............994

Here, a = 105

d = 7

a (n) = 994

$a +(n - 1)d = 994 \\ 105 + (n - 1) \times 7 = 994 \\ (n - 1) \times 7 = 889 \\ n - 1 = 127 \\ n = 128$

Therefore, no. of three digit numbers divisible by : 128