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
Ans 1: (Master Answer)
Class : Class 1
(C): Factors of 18 = 
Factors of 27 = 
So, 6 is not a common factor of 18 and 27.
Ans 2: (Master Answer)
Class : Class 1
(C): Factors of 18 =
Factors of 27 =
So, 6 is not a common factor of 18 and 27.
Ans 3:
Class : Class 6
man see 3 is a factor of 18 but 27 table does not have 3 as thier factor because 3 multiplied by six is eighteen but 27 does not have a factor so 6 is not a common factor of 27