Common factors of 27 35 and 30?
The factors of:
27: 1, 3, 9, 27
35: 1, 5, 7, 35
30: 1, 2, 3, 5, 6, 10, 15, 30
Common factors:
cf(27, 35): 1
cf(27, 30): 1, 3
cf(35, 30): 1, 5
cf(27, 35, 30): 1
27 = 3^3
35 = 5 x 7
30 = 2 x 3 x 5
The common factors are the factors of their highest common
factor:
hcf(27, 35) = 1 → cf(27, 35): 1
hcf(27, 30) = 3 → cf(26, 30): 1, 3
hcf(35, 30) = 5 → cf(35, 30): 1, 5
hcf(27, 35, 30) = 1 → cf(27, 35, 30): 1