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Topic: Grandpa and Grandma age?  (Read 28305 times)

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Offline Borek

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Grandpa and Grandma age?
« on: April 09, 2006, 05:04:44 AM »
Granpda and Grandma have 126 years togehter. How old is Grandma and how old is Grandpa, if Grandpa is twice older then Grandma was when Grandpa was as old as Grandma is now?
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Offline Mitch

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Re: Grandpa and Grandma age?
« Reply #1 on: April 09, 2006, 05:08:09 AM »
Grandpa is still alive?
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Offline Borek

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Re: Grandpa and Grandma age?
« Reply #2 on: April 09, 2006, 05:12:27 AM »
Most likely :)
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Offline xiankai

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Re: Grandpa and Grandma age?
« Reply #3 on: April 09, 2006, 05:18:09 AM »
grandma = x

(...)

grandma is ** years old, grandpa is ** years.

nice one borek, it really got me thinking.
« Last Edit: April 09, 2006, 05:38:04 AM by Borek »
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Offline Borek

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Re: Grandpa and Grandma age?
« Reply #4 on: April 09, 2006, 05:39:15 AM »
xiankai - OK,

I have edited your post, to not spoil fun for others ;)
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Offline pantone159

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Re: Grandpa and Grandma age?
« Reply #5 on: April 09, 2006, 05:56:03 PM »
That was kind of a tongue-twister for the brain.  At least Grandma Xena thought so, but 'Harrumf' said Grandpa.
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Offline Hunt

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Re: Grandpa and Grandma age?
« Reply #6 on: April 11, 2006, 06:09:45 PM »
x = ganrdma's present age , y = grandpa's present age

(deleted)

Grandpa is ** yrs old and Grandma's ** yrs old , they're not that old afterall :P



« Last Edit: April 11, 2006, 06:19:10 PM by Borek »
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Offline Borek

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Re: Grandpa and Grandma age?
« Reply #7 on: April 11, 2006, 06:19:42 PM »
Right :)

Post edited as usual ;)
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Offline constant thinker

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Re: Grandpa and Grandma age?
« Reply #8 on: April 11, 2006, 07:39:13 PM »
All it is is a simple system of equations.

http://www.1728.com/unknwn2.htm <- A nice calculator for this.

I would put the answers, but I'll save Borek the work of erasing it. ;)
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Offline Hunt

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Re: Grandpa and Grandma age?
« Reply #9 on: April 12, 2006, 09:21:23 AM »
Solving a system of 2 equations 2 unknowns isn't the difficult part, but rather establishing the equations, If you understand the question, it becomes very easy .
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Offline Borek

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Re: Grandpa and Grandma age?
« Reply #10 on: April 12, 2006, 09:33:07 AM »
It can be done with one unknown as well.
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Offline constant thinker

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Re: Grandpa and Grandma age?
« Reply #11 on: April 12, 2006, 03:17:38 PM »
Good point. If you just find 1 <.> of 126 then you can figure it out from there.
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Offline Hunt

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Re: Grandpa and Grandma age?
« Reply #12 on: April 12, 2006, 07:25:08 PM »
You can even solve it by trial and error.
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Offline Borek

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Re: Grandpa and Grandma age?
« Reply #13 on: April 12, 2006, 07:35:42 PM »
Quote from: Vant_Hoff on April 12, 2006, 07:25:08 PM
You can even solve it by trial and error.

Not before understanding the question :)
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Offline FeLiXe

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Re: Grandpa and Grandma age?
« Reply #14 on: April 13, 2006, 11:24:44 AM »
I have it

but I won't spoil it

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