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Math Riddle Thread

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Math Riddle Thread

Post by espíritu del lago on Fri Oct 19, 2018 11:32 am

Start with a classic math riddle. Please Submit your own favorites.

If your friend's son is four years old and his little brother is half his age (two years old), how old will the younger brother be if the older brother is 100?'
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Re: Math Riddle Thread

Post by slainte39 on Fri Oct 19, 2018 12:18 pm

scratch
Beats me!!!! lol!

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Re: Math Riddle Thread

Post by RVGRINGO on Fri Oct 19, 2018 12:38 pm

Noventa y ocho. They both retired to Mexico.

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Re: Math Riddle Thread

Post by espíritu del lago on Fri Oct 19, 2018 1:14 pm

I'm sure one of our Mensa geniuses will promptly enlighten U.S. :)
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Re: Math Riddle Thread

Post by DaveP on Fri Oct 19, 2018 1:35 pm

98

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Re: Math Riddle Thread

Post by slainte39 on Fri Oct 19, 2018 1:42 pm

Depends on when he died, usually aging and birthday years stop at that point.

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Re: Math Riddle Thread

Post by espíritu del lago on Fri Oct 19, 2018 3:37 pm

Correct Dave, [98]

The "half his age" is a red herring and useless information.
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Re: Math Riddle Thread

Post by espíritu del lago on Fri Oct 19, 2018 3:38 pm

RVGRINGO wrote:Noventa y ocho. They both retired to Mexico.

Exactly..
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Re: Math Riddle Thread

Post by espíritu del lago on Sat Oct 20, 2018 8:40 am

Next riddle
A fast food restaurant sells chicken in orders of 6, 9, and 20.

What is the largest number of pieces of chicken you cannot order from this restaurant?
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Re: Math Riddle Thread

Post by RVGRINGO on Sat Oct 20, 2018 9:40 am

19

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Re: Math Riddle Thread

Post by Jreboll on Sat Oct 20, 2018 9:43 am

Infinite number

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