Question: is 12 a factor of 30?
Answer: Factors of 22: 1, 2, 11, 22. Factors of 23: 1, 23. Factors of 24: 1, 2, 3, 4, 6, 8, 12, 24. ... Factors of 30: 1, 2, 3, 5, 6, 10, 15, 30.