Question

what is the common denominator of 13, 15, 9, and 8?

Answer 1

prime factors of 13 is 13
of 15 is 5 and 3
of 9 is 3 and 3
of 8 is 2,2,and 2
to find the LCM takes the largest group of each factor that exists or

13*5*3*3*2*2*2*2