Question

Find the sum of all numbers between 300 and 500 which are divisible by 3 and 5?

Answer 1

Step-by-step explanation:

LCM of 8 and 5 is 40. So, the numbers divisible by both 5 and 8 are multiples of 40. Between 300 and 500, we have 5 multiples of 40, they are : 320,360,400,440 and 480. The last 3 digits i.e. 048 are divisible by 8, hence this number is divisible by 8.