An even number is a multiple of 4 and a factor of 60. The number is greater than 17 but less than 23. What is the number?
Multiple(s) of 4: 4, 8, 12, 16, 20
Factor(s) of 60: 1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60
Common number that is greater than 17 but less than 23 = 20
Answer(s): 20