Bryan goes to the gym every 2 days.
Charlie goes to the gym every 4 days.
Adam goes to the gym every 7 days.
If they meet one another today, how many days later will they meet again?
Multiples of 2: 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28
Multiples of 4: 4, 8, 12, 16, 20, 24, 28
Multiples of 7: 7, 14, 21, 28
Number of days later that they will meet again = 28
Answer(s): 28