math freaks

rocketman122

Senior Member
reer.jpg

why so difficult for most?
 

BackdoorArts

Senior Member
Answer is 2.

The first 2 lines are statements with no connectivity with the last as there is no operator at the far right. The last line follows the normal math rules which means that in the absence of parenthesis you do all multiplication and division first (moving left to right) and after that all addition and subtraction (left to right). So for the last line you have...

1 + 1 x 0 + 1 = ?

Which, if you parenthesized it for the natural application of operations, would look like...

1 + (1 x 0) + 1 = ?

So doing the math you have...

1 + 0 + 1 = 2

Now, you can argue that the first two lines still must be dealt with, in which case you would have ...

5
5
2

But if you are solving for the ? then the answer is 2.
 
Last edited:

cwgrizz

Senior Member
Challenge Team
Rule 1: First perform any calculations inside parentheses.
Rule 2: Next perform all multiplications and divisions, working from left to right.
Rule 3: Lastly, perform all additions and subtractions, working from left to right.

A common technique for remembering the order of operations is the abbreviation "PEMDAS", which is turned into the phrase "Please Excuse My Dear Aunt Sally". It stands for "Parentheses, Exponents, Multiplication and Division, and Addition and Subtraction".
The Order of Operations: PEMDAS - Purplemath
The Order of Operations: PEMDAS
 

BackdoorArts

Senior Member
And it's difficult because, a) people don't pay attention to details (which is why they don't notice the missing operators at the end of each line and assume it's another '+'), and b) people didn't pay enough attention in math class because they spent too much time saying they'll never need it again (which explains why they get 1 instead of 12, bother of which are wrong.

Same reason why people stare at something like this forever...

d9d1d27bba94b9b52ffbc146f30ae9c1.jpg
 

BackdoorArts

Senior Member
Damn too much for my head of rocks. Some smart guys here

Dude, this is seriously an Are You Smarter Than A 5th Grader? question. Actually 3rd or 4th grade for the math. The trickiest part is the missing operators on lines 1 & 2. And yet, you can probably do exposure compensation in your head. ;)
 

rocketman122

Senior Member
Dude, this is seriously an Are You Smarter Than A 5th Grader? question. Actually 3rd or 4th grade for the math. The trickiest part is the missing operators on lines 1 & 2. And yet, you can probably do exposure compensation in your head. ;)

haha nice. I can blend flash with ambient light perfectly and yet this stumps me.
 
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