Question

write a program in c language to print all integers which are divisible by 7 between 100 and 200​

Answer 1

Answer:

Given;

Find the sum of all the numbers between 100 and 200 which are divisible by 7

The smallest number in between 100 and 200 which is divide by 7 = 105 and

The largest number in between 100 and 200 which

is divide by 7 = 196

Here,

smallest number(a) = : 105

largest number (an = 196

All no divide by (d) = 7

We know,

an = a + (n 1)d

Plug all value in above equation;

196 105+ (n − 1)7

→ 7n - 7 = 196 - 105

→ 7n = 91 +7

98 7

n = 14

..The sum of all the numbers between 100 and 200 which are divisible by 7 is equal to,

814 = (a + an)

S14 =

⇒ 814 = (105+196)

$147 x 301

814 = 2107

..The sum of all the numbers between 100 and 200 which are divisible by 7 is 2107