The least common multiple of two positive integers is 12 and their product is 12. What is their greatest common divisor ?

(A) 1

(B) 2

(C) 3

(D) 6

(E) 18

(SAT Subject Test Question)

Thanks in advance 🙂

Number pairs with LCM of 12: (12, 1), (4, 3)

In each case, their product is also 12, and in each case, their greatest common divisor is 1.

## Comments (2)

But if it is (6,2) , their greatest common divisor will be 2 ! , how 😂😂

The LCM of 6 and 2 is 6.