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Answer to Facebook Math Challenge – October 30, 2012

math problem
Jeff J Mitchell/Getty Images

[3 - (2 - 4(6 - 5) + 4)] + 2 = ?

 

The answer is 3!

Here’s the explanation, from my Facebook friend and former math minor, Monica Williamson:

You work within the inner parentheses first, 6-5=1.

The middle four is next to the one in parentheses so that means you you multiply: 4(1)=4.

Then you work to the outer parentheses:
2-4+4=2.

Then you work within the brackets: [3-2]=1.

Then you add that which is outside the brackets: 1+2=3.

Thanks to: www.math.wsu.edu for the question.

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