You are Here: Home >< Maths

# Maths Homework HELP! Watch

1. Bus A stops every 12 minutes and Bus B stops every 9 minutes on the same circuit. They stop at the same bus stop at 9:15am. When is the next time this happens? Thanks.
I'm sorry if this is easy, but I don't know how to do this... I got 9:51, but is there any better way to do it than counting up till the number matches?
2. (Original post by sweetstars)
Bus A stops every 12 minutes and Bus B stops every 9 minutes on the same circuit. They stop at the same bus stop at 9:15am. When is the next time this happens? Thanks.
I'm sorry if this is easy, but I don't know how to do this... I got 9:51, but is there any better way to do it than counting up till the number matches?
It would be the LCM of 9 and 12 which is 36 since this is the lowest number that can be obtained by both using an integer multiple. so, the time is 9:15 + 36mins ---> 9:51
3. (Original post by sweetstars)
Bus A stops every 12 minutes and Bus B stops every 9 minutes on the same circuit. They stop at the same bus stop at 9:15am. When is the next time this happens? Thanks.
I'm sorry if this is easy, but I don't know how to do this... I got 9:51, but is there any better way to do it than counting up till the number matches?
i think your answer is right bcoz u find the LCM of 9 and 12 (which is 36) and add that to the original time. This gives u 9:51
4. (Original post by 123Master321)
It would be the LCM of 9 and 12 which is 36 since this is the lowest number that can be obtained by both using an integer multiple. so, the time is 9:15 + 36mins ---> 9:51
Thank you so much! XD I was so confused as to how my LCM and HCF homework had anything to do with this word problem.
5. (Original post by DD2508)
i think your answer is right bcoz u find the LCM of 9 and 12 (which is 36) and add that to the original time. This gives u 9:51
Thank you so much! I had to use a lot of Tippex from all my thinking and mistakes I made from not knowing the answer. XD

Updated: October 14, 2016
TSR Support Team

We have a brilliant team of more than 60 Support Team members looking after discussions on The Student Room, helping to make it a fun, safe and useful place to hang out.

This forum is supported by:
Today on TSR

### HELP!

Mum wants to come to Freshers

Poll
Useful resources

## Make your revision easier

### Maths Forum posting guidelines

Not sure where to post? Read the updated guidelines here

### How to use LaTex

Writing equations the easy way

### Study habits of A* students

Top tips from students who have already aced their exams

Can you help? Study help unanswered threads

## Groups associated with this forum:

View associated groups
Study resources

The Student Room, Get Revising and Marked by Teachers are trading names of The Student Room Group Ltd.

Register Number: 04666380 (England and Wales), VAT No. 806 8067 22 Registered Office: International House, Queens Road, Brighton, BN1 3XE

Reputation gems: You get these gems as you gain rep from other members for making good contributions and giving helpful advice.