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 Post subject: Help - Question on past Maths paperPosted: Wed Mar 30, 2011 8:44 pm

Joined: Wed Jun 16, 2010 12:17 pm
Posts: 14
Hi All,

The ages of Henry, James & Toby add up to 104. Henry is twice as old as James and James and Toby are twins. How old is Henry?

I worked out the answer to be 52. Can anyone share how best to arrive at the answer in a logical, step by step method that a 10 year old can understand.

Thanks

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 Post subject: Re: Help - Question on past Maths paperPosted: Wed Mar 30, 2011 9:12 pm

Joined: Sat Feb 13, 2010 11:02 pm
Posts: 420
kaytee1916 wrote:
The ages of Henry, James & Toby add up to 104. Henry is twice as old as James and James and Toby are twins. How old is Henry?

As Henry is twice as old as James, he can replace both of the twins in the original formula

Henry+James +Toby =104

can become

Henry +Henry = 104

therefore Henry =52

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 Post subject: Re: Help - Question on past Maths paperPosted: Thu Mar 31, 2011 10:09 am

Joined: Wed Jun 16, 2010 12:17 pm
Posts: 14
Very well explained! Thanks very much, 999mum.

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 Post subject: Re: Help - Question on past Maths paperPosted: Thu Mar 31, 2011 11:24 am

Joined: Sun May 09, 2010 12:04 pm
Posts: 2570
Please, could anyone advise a book with this kind of exercises: word problems involving algebra?

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 Post subject: Re: Help - Question on past Maths paperPosted: Fri Apr 01, 2011 9:40 am

Joined: Tue Jul 21, 2009 9:56 pm
Posts: 8228
sorry I can't but if this is the type of question that comes up frequently in the exams you are aiming at, it might be a good idea to construct some problems of your own?

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