What is the sum of all natural numbers between 100 and 400 which

What is the sum of all natural numbers between 100 and 400 which
| What is the sum of all natural numbers between 100 and 400 which are divisible by 13?

A. 5681

B. 5334

C. 5434

D. 5761

Please scroll down to see the correct answer and solution guide.

Right Answer is: A

SOLUTION

First number divisible by 13 between 100 and 400 is 104 and last number is 390
390=104+(n-1)× 13
286=(n-1)× 13
n=23
sum=

Related Questions