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Message Subject Math: 6÷2(1+2) = ?
Poster Handle Anonymous Coward
Post Content
What people forget is PEMDAS needs to be applied Left to right.

Rules

1. Calculations must be done from left to right.

2. Calculations in brackets (parenthesis) are done first. When you have more than one set of brackets, do the inner brackets first.

3. Exponents (or radicals) must be done next.

4. Multiply and divide in the order the operations occur.

5. Add and subtract in the order the operations occur.


So 6÷2(1+2) = ?

First in order is (1+2) which equals 3
so now you have
6÷2*3=?
Now remember it is done from left to right so even though in PEMDAS multiplications comes first... in the problem at had starting at the 6 and working left to right the division comes first so then you divide 6÷2=3
So now you have 3*3 which equals 9.

So 9 is the correct answer and if you come up with 1 as an answer you need to remember it is left to right



It IS a trick question because the arithmetic layout is ambiguous.

6÷[2(1+2)] = 1

(6÷2)(1+2) = 9

It's not a difficult problem, it's just laid out wrong.

The question is deliberately ambiguous and that people get different answers is of no surprise.
 Quoting: Anonymous Coward 1368046


You are retarded, its not a trick, its the rules of math, short notation maybe, but certainly fair game for second or third grade.
 Quoting: Anonymous Coward 1309528
 
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