Help - Question on past Maths paper

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kaytee1916
Posts: 14
Joined: Wed Jun 16, 2010 1:17 pm

Help - Question on past Maths paper

Post by kaytee1916 »

Hi All,

Please help. Here's the question:

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
999 mum
Posts: 422
Joined: Sun Feb 14, 2010 12:02 am

Re: Help - Question on past Maths paper

Post by 999 mum »

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
kaytee1916
Posts: 14
Joined: Wed Jun 16, 2010 1:17 pm

Re: Help - Question on past Maths paper

Post by kaytee1916 »

Very well explained! Thanks very much, 999mum.
JaneEyre
Posts: 4843
Joined: Sun May 09, 2010 1:04 pm

Re: Help - Question on past Maths paper

Post by JaneEyre »

Please, could anyone advise a book with this kind of exercises: word problems involving algebra?
Thanks in advance! :D
mystery
Posts: 8927
Joined: Tue Jul 21, 2009 10:56 pm

Re: Help - Question on past Maths paper

Post by mystery »

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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