Practice Multiples in Math
Use these practice problems to test your method after reviewing the concept explanation and worked examples.
Quick Recap
Numbers obtained by multiplying a given number by positive integers: the skip-counting sequence n, 2n, 3n, 4n, \ldots
Skip-counting produces multiples: counting by 3s gives 3, 6, 9, 12... — those are the multiples of 3.
Example 1
easyList the first 6 multiples of 7, and find the 20th multiple of 7.
Example 2
mediumFind all multiples of 6 between 50 and 100 (inclusive). How many are there?
Example 3
easyIs 252 a multiple of 7? Of 12? Show your reasoning.
Example 4
mediumA light flashes every 4 seconds and a buzzer sounds every 6 seconds. They start together. When will they next coincide? How many times in one minute?