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Maths question
Posted: Tue Nov 25, 2008 9:59 pm
by WFW1112
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.
Posted: Tue Nov 25, 2008 11:25 pm
by dadofkent
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.
Posted: Tue Nov 25, 2008 11:33 pm
by WFW1112
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.
Posted: Wed Nov 26, 2008 8:15 am
by Guest55
'Starting from day one' may not mean the first delivery is THAT day - letters may be delivered on day 2,4,6, etc .
Posted: Wed Nov 26, 2008 12:04 pm
by sycamore
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?
Posted: Wed Nov 26, 2008 2:39 pm
by perplexed
Perhaps one of them gets a fortnight's holiday!!
Posted: Wed Nov 26, 2008 3:29 pm
by WFW1112
[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...
Posted: Wed Nov 26, 2008 3:55 pm
by dadofkent
I could only put it down to the postman not delivering on Sundays.
Posted: Fri Nov 28, 2008 10:34 am
by Mike
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