Find each of the following.

Question

(a) GCD(12, 26, 65)

(b) LCM(12, 26, 65)

Answer 1

the GCD for 12,26,65 is 1
that is, there is no divisor or common factor other than 1 which divides into all 3 numbers

for LCM
12 = 2x6
26 = 2x13
65 = 5x13

so we need 2x6x13x5 or 780