Thread: 6÷2(1+2) = ?
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Old April 28th, 2011, 09:47 PM   #61 (permalink)
DaSchmarotzer
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Quote:
Originally Posted by Vihzel View Post

Calculations:

6÷2(1+2) =
6÷2(3) =
3*3 =
9

This is right.

6÷2(1+2) =
6÷2(3) =
6÷6 =
1

Wrong. To "see" it correctly, the equation should be written as (6/1)*(1/2)*((1+2)/1), which equals (6/1)*(1/2)*(3/1), which equals 9 no matter the order of the three "terms".

6÷2(1+2) =
6÷2+4 =
3+4 =
7

Now that's just stupid.
There you go. It's been said before, but I tried to express it differently.

PS: I like to riddle my friends with this. I start with the first statement and proceed from there.

________a = b________________(Premise)
_____a^2 = ab________________(multiply each side by a)
a^2 - b^2 = ab - b^2__________(subtract b^2 from each side)
(a+b)(a-b) = b(a-b)____________(factorization)
____(a+b) = b_________________(simplification)
_____b+b = b_________________(according to the premise)
______2b = b_________________(addition...)
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Last edited by DaSchmarotzer; April 28th, 2011 at 10:00 PM.
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