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 Post subject: maths question - consecutive numbersPosted: Thu May 19, 2011 10:18 am

Joined: Tue Nov 11, 2008 10:06 am
Posts: 54
I was wondering if there was a quick way to answer the consecutive number questions or is it simply trial and error, choosing numbers and seeing what fits?

eg The sum of 3 numbers is 21. what is the smallest of these numbers?

Thanks

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 Post subject: Re: maths question - consecutive numbersPosted: Thu May 19, 2011 10:23 am

Joined: Fri Sep 15, 2006 8:51 am
Posts: 8080
if they are consecutive numbers then best to divide the total ie 21 by 3 to get 7, the consecutive numbers will be 7-1, 7 and 7+1
- middle number will be 7 smallest will be 6 and largest will be 8

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 Post subject: Re: maths question - consecutive numbersPosted: Thu May 19, 2011 2:01 pm

Joined: Thu Oct 21, 2010 9:54 am
Posts: 299
hermanmunster wrote:
if they are consecutive numbers then best to divide the total ie 21 by 3 to get 7, the consecutive numbers will be 7-1, 7 and 7+1
- middle number will be 7 smallest will be 6 and largest will be 8

WOW

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 Post subject: Re: maths question - consecutive numbersPosted: Wed Jun 15, 2011 8:18 pm

Joined: Thu Feb 17, 2011 1:34 pm
Posts: 59
same for adding all the numbers between 0 and 100 - just need to realise there are 101 numbers with an average of 50

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 Post subject: Re: maths question - consecutive numbersPosted: Sun Jun 19, 2011 8:56 pm

Joined: Tue Jul 31, 2007 9:37 am
Posts: 405
wizard wrote:
I was wondering if there was a quick way to answer the consecutive number questions or is it simply trial and error, choosing numbers and seeing what fits?

eg The sum of 3 numbers is 21. what is the smallest of these numbers?

Thanks

Out of curiousity what age range is this question aimed at: Year 3, Year 4, Year 5 or Year 6?

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 Post subject: Re: maths question - consecutive numbersPosted: Sun Jun 19, 2011 9:52 pm

Joined: Mon Jun 18, 2007 2:32 pm
Posts: 6940
Location: East Kent
they are typical 11+ questions, so 5/6

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