What two numbers have the LCM of 90?

Answer 1

There are infinitely many such pairs of numbers. As long as the only primes they have in common are 2×3²×5 (the prime factorization of 90) their gcf will be 90:

Some examples:

90, 180

90, 270

90, 360

180, 270

180, 450

450, 630

630, 990

Answer 2

This has multiple solutions. Any multiples of 90, "90a" and "90b", such that "a" and "b" are relatively prime (have no common factors).

Answer 3

The GCF of any two numbers can only be one number: it cannot be 30 as well as 90.

Answer 4

3 and 90 do.

Answer 5

The GCF of 30 and 90 is 30.

Answer 6

3 and 90

Answer 7

3 and 90

Answer 8

30 and 45

Answer 9

156