Question

The least common multiple of two numbers is 22. One number is even, and one number is odd.

What are the numbers?

Answer 1

22 = 2 · 11

2 is even
11 is odd

LCM(2; 11) = 22

but we have other answer:

22 = 1 · 22

22 is even
1 is odd

LCM(1; 22) = 22

Answer: 2 and 11 or 22 and 1.