Question

How many number between 800 and 1100 will be completely divisible by 79?

Answer 1

Answer:

3 numbers come in between 800 and 1100 which will be divisible by 79

Step-by-step explanation:

L = A + (N - 1)*D,

Here, L is the last digit,

A is the first digit,

N is the number of digits in between, and D is the difference.

So, A =869 (after 800 this is the first number which is completely divisible by 79)

L = 1027 (last number which is divisible by 79 completely in 800–1100 range).

D = 79, and N we need to calculate.

1027=869+(N-1)*79

1027-869=79N-79

158+79=79N

79N=237

N=237/79

N=3