Answer:
It will take 42 days to pass before all three bike ride at the park on the same day.
Step-by-step explanation:
multiples of 3: 3, 6, 9 , 12, 15, 18, 21, 24,27, 30, 33, 36, 39, 42
multiples of 6: 6, 12, 18, 24, 30, 36, 42
multiples of 7: 7, 14, 21, 28, 35 ,42
the LCM or least common multiple is the first number in the list that 3, 6, and 7 both have. The first number is 42 because they dont have any other numbers in common before that.
I hope this helped you:)