Bryan goes to the gym every 2 days.
Adam goes to the gym every 4 days.
Charlie goes to the gym every 5 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
Multiples of 4: 4, 8, 12, 16, 20
Multiples of 5: 5, 10, 15, 20
Number of days later that they will meet again = 20
Answer(s): 20