Find the following values without a calculator. What is/are the common factors of 18 and 42?
Give your answers in this manner. (Eg 1, 2, 3, 4)
Factors of 18: 1, 2, 3, 6, 9, 18
Factors of 42: 1, 2, 3, 6, 7, 14, 21, 42
Common factors: 1, 2, 3, 6
Answer(s): 1, 2, 3, 6