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 Post subject: Maths question
PostPosted: Tue Nov 25, 2008 8:59 pm 
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Joined: Mon Sep 15, 2008 9:23 pm
Posts: 42
We are a bit confused with following question:

The postman delivers letters to the same house every other day. The paperboy delivers a weekly paper to the house. Starting from day one. how many times will the house receive a letter and a paper on the same day in one year?

The correct answer is 25, but ours is 27, could anybody give us any help?
Thanks in advance.


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 Post subject:
PostPosted: Tue Nov 25, 2008 10:25 pm 
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I get 27 as well

Lowest Common Multiple is 14.

26 X 14 = 364 (days)

Meet therefore on first and last but one day of year.

27 Meetings altogether.


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 Post subject:
PostPosted: Tue Nov 25, 2008 10:33 pm 
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We did exactly the same. Perhaps the answer is wrong?

This is the one question in Tutors Maths CD1 section 18 ( Miscellaneous) No 30 question.


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 Post subject:
PostPosted: Wed Nov 26, 2008 7:15 am 
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'Starting from day one' may not mean the first delivery is THAT day - letters may be delivered on day 2,4,6, etc .


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 Post subject:
PostPosted: Wed Nov 26, 2008 11:04 am 
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Location: South Wilts
The only answers I can come up with are 27 (if postman and paperboy both deliver on day 1) or 26 (any other combination).

They have to deliver on the same day once a fortnight and this has to happen at least 26 times as there are 26 fortnights in a year.

Or have I missed something? :?


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 Post subject:
PostPosted: Wed Nov 26, 2008 1:39 pm 
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Location: kent
Perhaps one of them gets a fortnight's holiday!!


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 Post subject:
PostPosted: Wed Nov 26, 2008 2:29 pm 
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[quote="perplexed"]Perhaps one of them gets a fortnight's holiday!![/quote]

That was I told my son last night, and he laughed to stomachache...


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 Post subject:
PostPosted: Wed Nov 26, 2008 2:55 pm 
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I could only put it down to the postman not delivering on Sundays.


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 Post subject:
PostPosted: Fri Nov 28, 2008 9:34 am 
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Joined: Thu Jan 12, 2006 3:29 pm
Posts: 625
Hi WFW112

We have had a look at the question and the correct answer should be "E", 27. The change should be made within the next few days and anyone who has purchased a CD or download can obtain a revised version. Thanks for drawing this to our attention.

Regards

Mike

_________________
Mike Edwards is a co-author of The Tutors product range.


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