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  #1  
Old 01-07-2007, 12:36 PM
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Where's daddy?

Here's some fun for you moonies... a little math problem:

Question :

The mother is 21 years older than the child.

In 6 years from now the mother will be 5 times as old as the child.

Where's the father?

When/if you get the answer, PM me.
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Old 01-09-2007, 12:58 PM
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Re: Where's daddy?

just saw this and sent you a PM with the answer...
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Old 01-09-2007, 06:18 PM
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Re: Where's daddy?

ibid
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Old 01-11-2007, 12:07 AM
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Re: Where's daddy?

So what's the answer already !!! It's driving me nuts!!
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Old 01-11-2007, 02:58 AM
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Re: Where's daddy?

Quote:
Originally Posted by DragonStab View Post
So what's the answer already !!! It's driving me nuts!!
Hmmmmm...........in a weird sort of way "nuts" could be relevant DS.
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Old 01-11-2007, 06:16 AM
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Re: Where's daddy?

Quote:
Originally Posted by KeithieW View Post
Hmmmmm...........in a weird sort of way "nuts" could be relevant DS.
Driving nuts too!

OK. Enough of you responded and most with the correct answer.


A little simple algebra is needed.

First: The mother (M) is (=) 21 years older (+) than the Child (C).

M = 21 + C

Second: In 6 years from now the mother (M +6) will be (=) 5 times (5*) as old as the child {6 years from now} (C + 6).

M + 6 = 5 * (C + 6)

We now have a system of linear equations which can be solved in a number of different ways. The simplest is by substitution. Substitute the relation ship of Mother to Child's age in the First equation into the second:

(21 + C) +6 = 5 * (C +6) :: 27 + C = 5C + 30

Now collecting the like terms yeilds:

C - 5C = 30 - 27 :: -4C = 3

C (the child's age) = -3/4 (years)

This is 9 months before the child is born, so it must be the moment of conception. The whereabouts of the father are now left as an exercise for the reader.


Just trying to keep your math skills fresh and your minds dirty!
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Old 01-11-2007, 07:33 AM
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Re: Where's daddy?

Ouch... math hurt brain. Me pound drum instead.....
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Old 01-11-2007, 06:30 PM
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Re: Where's daddy?

No Rick she was 21 years older. I'd guess that "daddy" was giving her one hell of a 21st birthday present!
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VAXman -- Watcher of the moon, watcher of all.
----------------Mopper of the moon, mopper of all.
-------------------- Aural Moon's Janitorial Services
---------------------and Restroom Supplies, and Techno-patsy --

Cogito ergo iMac.         
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  #9  
Old 01-11-2007, 09:43 PM
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Re: Where's daddy?

And I mentally managed to get the child's age to -1.8 years , which is indeed possible for the african elephant, so I figured daddy was in Africa. Lol, should never use my head unnecessarily...

Btw, no need for an eq. system really as six years from now, if child then is c years, mother will be 5c years. Since the difference remains, 5c - c = 21 years, i.e. the child is then c = 21/4 = 5.25 years, which translates to -0.75 years now.

VAXman, thanks for twisting our brains Hoping for followers. I might have something in a drawer somewhere...
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