Question: 20 is a multiple of 3?
Answer: Since 20 is not on the list of multiples of 3, the answer to the question "Is 20 a multiple of 3?" is: No. Another way, would be to simply divide 20 by 3. If the result is a positive integer, then 20 is a multiple of 3. 20 divided by 3 equals 6.667, which is not a positive integer.