Question

Which is the smallest number that is exactly divisible by 45,90and 105?

Answer 1

The question indirectly asks the LCM of given numbers

45 = 5*9=5*3*3

90= 2*5*3*3

105= 5*21=3*5*7

LCM = 5*3*3*3*2*7 = 1890