bus a stops every 12 minutes and bus b stops every 9 minutes on the same circuit.they stop at the same bus 9:15.when is the next time this happens?
6 answers
What is the least common multiple of 12 and 9?
No.
Multiples of 9:
9, 18, 27, 36, 45, 54, etc.
Multiples of 12?
Multiples of 9:
9, 18, 27, 36, 45, 54, etc.
Multiples of 12?
12,24......
Keep going until you find the common multiple.
36?
Yes. The next time they're together at that stop will be 36 minutes later.
2 answers