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 Post subject: maths help- urgent
PostPosted: Sat Sep 24, 2011 2:51 pm 
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Joined: Thu Mar 17, 2011 12:58 pm
Posts: 92
Rhys and Ricky's age add upto 10. In 10 years time , Rhys will be one and a half times as old as Ricky. How old is Ricky now?

Many Thanks,


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 Post subject: Re: maths help- urgent
PostPosted: Sat Sep 24, 2011 3:20 pm 
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In 10 years time their ages will add up to 30 (10 +10 +10), Rhys age will be 3/5 of 30, Ricky 2/5 of 30, which makes Ricky 12 in 10 years, therefore he his 2 now.

I think that works?


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 Post subject: Re: maths help- urgent
PostPosted: Sat Sep 24, 2011 4:44 pm 
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Posts: 92
Thankyou, NorthlondonMum!. Got it.


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 Post subject: Re: maths help- urgent
PostPosted: Mon Apr 09, 2012 4:15 pm 
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Why will their ages add up to 30 in ten years' time and not 20, if they add up to ten now? Sorry- I am awful at the logic at Maths.


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 Post subject: Re: maths help- urgent
PostPosted: Mon Apr 09, 2012 4:35 pm 
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Because they are adding ten years each to the total


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 Post subject: Re: maths help- urgent
PostPosted: Mon Apr 09, 2012 4:43 pm 
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Joined: Fri Nov 16, 2007 9:49 pm
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The equations are:

Rh + Ri = 10
Rh + 10 = (Ri +10) * 3 / 2

Rh + 10 = (20 - Rh) * 3 / 2
Rh + 10 = 30 - 3Rh / 2
5Rh / 2 = 20
Rh = 40 / 5 = 8


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 Post subject: Re: maths help- urgent
PostPosted: Mon Apr 09, 2012 4:48 pm 
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Joined: Mon Feb 12, 2007 1:21 pm
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Algebra really doesn't help with these questions - the first method posted is easier to understand.


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 Post subject: Re: maths help- urgent
PostPosted: Mon Apr 09, 2012 5:12 pm 
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Joined: Sun Apr 08, 2012 9:55 am
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Thank you everybody for replying. I appreciate it. I am new to this and am reading these forums with growing fascination (and terror!).


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