What's the answer?

[FallentoReason]

Quite simple really just work out the answer to this question.

1+1+1+1+1+1+1+1+1+1x0 = ?

Is it;

A) 10
B) 0
C) 9
D) 1

Enjoy.

Multiplication comes before addition, so it's:

1+1+1+1+1+1+1+1+1+0 = 9

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(1-1)(1+1)/1-1 = 1(1-1)/1-1

You're dividing by zero. Error!

He didn't divide by zero...

(1-1)(1+1)/(1-1)

That's dividing by zero. Whether that's what he intended to mean or not is a different question.

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No, the answer is nine according to PEMDAS based mathematics.
You perform the multiplication first which negates the last addition to zero.
You then simply add the nine ones together.

Made more simple..

1+1x0 = 1

1+1x0 = 1 // 1 = 1
1x1 = 1 // 1 = 1
1x1 = 1x1 // 1 = 1
(1x1)-(1x1) = (1x1)-(1x1) // 0 = 0
(1-1)(1+1)/1-1 = 1(1-1)/1-1 // -1 = -1
(1+1) = 1 // 2 =/= 1
(1+1)-1 = 1-1 // 1 =/= 0
1 = 0

I think it is 0.

The bolded is mine.

I don't get it...