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PostPosted: Thu Sep 17, 2009 3:55 pm 
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Joined: Thu Sep 17, 2009 3:49 pm
Posts: 2
Hi. I need help with this particular exercice.

A milkman and a baker deliver to the same house.
In a period of 28 days, the milkman calls every second day and the baker every third day.
They meet at the house twice in the first 7 days.
How many more times do they meet during the 4 week period?

Please...


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PostPosted: Thu Sep 17, 2009 4:17 pm 
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Joined: Tue May 05, 2009 9:26 pm
Posts: 444
Hi

If you scroll down in the maths section you will see that there was a thread started about how to approach this question a few days ago

Twinkle


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PostPosted: Thu Sep 17, 2009 4:34 pm 
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Joined: Thu Jan 03, 2008 8:26 am
Posts: 1326
Location: Watford, Herts
london_ilusion wrote:
A milkman and a baker deliver to the same house.
In a period of 28 days, the milkman calls every second day and the baker every third day.
They meet at the house twice in the first 7 days.
How many more times do they meet during the 4 week period?

The milkman and baker meet every 6 days (the smallest common multiple of 2 and 3). To see this, it might help to start with a number line, and draw one colour hopping every second day and another hopping every third day. We're told they met twice in the first 7 days, so they must have met on the 1st and 7th days. They will meet again on the 13th, 19th and 25th days, i.e. 3 more times.
Code:
milkman
----------------------------------------------------------------------------------
|     |     |     |     |     |     |     |     |     |     |     |     |     |   
1--2--3--4--5--6--7--8--9-10-11-12-13-14-15-16-17-18-19-20-21-22-23-24-25-26-27-28
|        |        |        |        |        |        |        |        |        |
----------------------------------------------------------------------------------
baker


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PostPosted: Thu Sep 17, 2009 4:50 pm 
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Joined: Mon Jun 18, 2007 2:32 pm
Posts: 6966
Location: East Kent
I'm a great fan of diagrams


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PostPosted: Thu Sep 17, 2009 5:41 pm 
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Joined: Thu Sep 17, 2009 3:49 pm
Posts: 2
Thank you very much WP. Very helpful


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