Question 599106: Ashley rides her bike every 8 days. Sam rides her bike every 12 days, and James rides his bike every 18 days. If they all ride their bikes today, in how many days will they all ride their bikes again on the same day?
Found 2 solutions by ankor@dixie-net.com, flame8855:
Answer by ankor@dixie-net.com(22740)   (Show Source):
You can put this solution on YOUR website! Ashley rides her bike every 8 days. Sam rides her bike every 12 days, and James rides his bike every 18 days.
If they all ride their bikes today, in how many days will they all ride their bikes again on the same day?
:
This is a Least Common Multiple problem
:
Prime factor each
8: 2,2,2
12:2,2,3
18:2*3*3
Therefore
2*2*2*3*3 = 72 days
Answer by flame8855(424)  (Show Source):
You can put this solution on YOUR website! we have 8, 12 , 18
we need to find a number that is divisible by 8 12 and 18
72 is divisible by 8 , 12 18
after 72 days they will start together again
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