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Topic: Math Fun... (Read 785 times) |
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jpk2009
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Math Fun...
« on: Feb 18th, 2010, 9:34am » |
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If
2 + 3 = 10
7 + 2 = 63
6 + 5 = 66
8 + 4 = 96
then
9 + 7 = ????
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| « Last Edit: Feb 18th, 2010, 9:35am by jpk2009 » |
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jpk2009
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Re: Math Fun...
« Reply #2 on: Feb 19th, 2010, 12:39pm » |
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Cool. You just won a free baked turkey! Kidding!
By the way, why the double minus?
- -b = b for all b
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0.999...
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Re: Math Fun...
« Reply #3 on: Feb 19th, 2010, 1:32pm » |
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It's ambiguous which plus operator is referred to in the alternative case.
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jpk2009
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Re: Math Fun...
« Reply #4 on: Feb 19th, 2010, 3:41pm » |
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Oh of course, thanks for the reminder. In general, + is an operator but not the usual addition operator. It is easy to solve the problem but I suppose that the precise math picture would be based on that itself. I think the algebraists would say that + is an abstract operator.
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towr
wu::riddles Moderator
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Some people are average, some are just mean.
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Re: Math Fun...
« Reply #5 on: Feb 20th, 2010, 6:31am » |
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I like the convention where they put a circle around the plus (and other operators) when they aren't the usual ones.
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Wikipedia, Google, Mathworld, Integer sequence DB
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classy_man
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Re: Math Fun...
« Reply #6 on: Mar 4th, 2010, 11:40pm » |
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The answer is 144
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