Subject :IMO Class : Class 4
Which of the following is NOT a common factor of 18 and 27?
A 1
B 3
C 6
D 9
6 is a common factor of 18 as-6 x 3 = 18
Which of the following is NOT a common factor of 18 and 27?
A 1
B 3
C 6
D 9