Question

Q1) Find the greatest number of five digits that can be exactly divisible by 60,90
and 80.​

Answer 1

Lcm of 60, 80 & 90 is 720

Now we divide smallest five digit number 10000 by 720 & we get 80 excess in reminde.

So, if we add 80 with 10000 that will be the smallest number which can divide by 60, 80 & 90.

So the number is 10000+80 = 10080

Hope it will help you