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Math Riddle Thread

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Post by espíritu del lago 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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Post by slainte39 Fri Oct 19, 2018 12:18 pm

scratch
Beats me!!!! lol!

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

Noventa y ocho. They both retired to Mexico.

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

I'm sure one of our Mensa geniuses will promptly enlighten U.S. :)
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Post by DaveP Fri Oct 19, 2018 1:35 pm

98
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Post by slainte39 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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Post by espíritu del lago 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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Post by espíritu del lago Fri Oct 19, 2018 3:38 pm

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

Exactly..
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Post by espíritu del lago 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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Post by RVGRINGO Sat Oct 20, 2018 9:40 am

19

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

Infinite number

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