How many positive factors do 150 and 90 have in common?
Select the correct option:
A) 8
B) 12
C) 16
D) 18
E) 24

Rationale: the number of common factors will be same as number of factors of the highest common factor ( hcf ) hcf of 150 and 90 is 30 number of factors of 30 = 8 answer : a
Answer: A