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November 08, 2025, 01:54:00 pm
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Author Topic: worded question :@  (Read 1754 times)  Share 

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cindyy

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worded question :@
« on: February 28, 2010, 04:35:26 pm »
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A boy is three years younger than his sister.  If his age three years ago was two-thirds her age at that time, what are their present ages?
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TrueTears

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Re: worded question :@
« Reply #1 on: February 28, 2010, 04:37:31 pm »
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x be boy age present

y be sister age present

x = y-3 ...[1]

(x-3) = (2/3)(y-3) ..[2]
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cindyy

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Re: worded question :@
« Reply #2 on: February 28, 2010, 04:45:04 pm »
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i just got it -__-
thanks :)
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mandy

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Re: worded question :@
« Reply #3 on: February 28, 2010, 04:45:50 pm »
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Do you have the answer to this? Is the sister 12 and the brother 9 ? :S
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cindyy

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Re: worded question :@
« Reply #4 on: February 28, 2010, 04:48:15 pm »
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thats what i got as well, so if 2 people have that answer, it must be right ;)
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the.watchman

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Re: worded question :@
« Reply #5 on: February 28, 2010, 04:49:18 pm »
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Quote from: mandy on February 28, 2010, 04:45:50 pm
Do you have the answer to this? Is the sister 12 and the brother 9 ? :S

Yep, that seems right! :)
Make it three
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Re: worded question :@
« Reply #6 on: February 28, 2010, 04:53:38 pm »
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yea i think i got dat too
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cindyy

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Re: worded question :@
« Reply #7 on: February 28, 2010, 04:58:51 pm »
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well while we are here, i will ask another question:)

x and x+1 are two consecutive natural numbers. 1/4 of the larger exceeds 1/6 of the smaller by 1. Find the  value of x.
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TrueTears

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Re: worded question :@
« Reply #8 on: February 28, 2010, 05:00:41 pm »
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1/4(x+1)-1=(1/6)x
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the.watchman

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Re: worded question :@
« Reply #9 on: February 28, 2010, 05:01:27 pm »
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Well set up the equation first and it becomes easier:







So the two numbers are 9, 10

EDIT: beaten... :P
« Last Edit: February 28, 2010, 05:03:54 pm by the.watchman »
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cindyy

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Re: worded question :@
« Reply #10 on: February 28, 2010, 05:02:24 pm »
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oh what ... i totally did that i got 9/5 :S
i think i suck at this subject! Lol thank youu
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Re: worded question :@
« Reply #11 on: February 28, 2010, 05:02:57 pm »
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its ok.
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cindyy

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Re: worded question :@
« Reply #12 on: February 28, 2010, 05:06:53 pm »
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wait, i just did it again, isnt it supposed to be 9 +10
:S How did you get 12 + 13?
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the.watchman

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Re: worded question :@
« Reply #13 on: February 28, 2010, 05:07:25 pm »
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Quote from: cindyy on February 28, 2010, 05:06:53 pm
wait, i just did it again, isnt it supposed to be 9 +10
:S How did you get 12 + 13?

Lol, check again, I've changed it :D
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mandy

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Re: worded question :@
« Reply #14 on: February 28, 2010, 05:07:47 pm »
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It is 9 and 10, I think he just fixed it or something.
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