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6÷2(1+2)=? 1 or 9?

maths subject boredtimes counting

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Poll: FUNNY MATHS (40 members have cast votes)

You have to complete 250 battles in order to participate this poll.

6÷2(1+2)=?

  1. 1 (17 votes [42.50%] - View)

    Percentage of vote: 42.50%

  2. 9 (19 votes [47.50%] - View)

    Percentage of vote: 47.50%

  3. WTF! NO ANSWER! (4 votes [10.00%] - View)

    Percentage of vote: 10.00%

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___eXPLOSIVo___ #1 Posted 21 June 2013 - 03:31 PM

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Hey guys!

I was bored in the game and found this task. Let's test the players of WoT that how they solve this "small problem".


http://imageshack.us...es/89/fdey.jpg/


Good luck =)

_Warris_ #2 Posted 21 June 2013 - 03:37 PM

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number in between the ( ) first makes 6:2(3)
number before the ( is a x to the numbers inside the () makes 6:6=1.
  :glasses:

___eXPLOSIVo___ #3 Posted 21 June 2013 - 03:38 PM

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Well, are you sure?:)

remuneratio #4 Posted 21 June 2013 - 03:40 PM

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crap i voted wrong, its 1
->

6
______

2x(1+2)

ssgtom #5 Posted 21 June 2013 - 03:41 PM

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When mathematical sign is missing between a number and bracked, it indicates a multiplication, so the term is the same as:

6 : 2 * (1+2)

Dividing something is the same as multiplication with the reziprok, so the term is the same as:

6 * (1/2) * (1+2)

Now you see the answer is 9!



Another Explanation if you don't believe the first one... Mathematical multiplication and division operators are all LEFT associative (see http://en.wikipedia....i/Associativity). That means, when you have more than one multiplication and/or division in a row, you have to start from the left, so first you have to take 6 : 2 and afterwards the result multiplicated with the brackets. So:

6 : 2 (1+2)
= (6 : 2) * (1+2)
= 3 * 3
= 9

If you want it to be 1 as result, the term at the beginning must be:

6 : ( 2 * (1+2) )

Edited by ssgtom, 21 June 2013 - 03:53 PM.


ilosz #6 Posted 21 June 2013 - 03:49 PM

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*Stupid mistake* :hiding:

Edited by ilosz, 21 June 2013 - 04:11 PM.


conductiv #7 Posted 21 June 2013 - 03:50 PM

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answer is 9, divide and multiply are mathematical equals so have to be taken in turn. part between brackets is done first.

so it is
6:2*(1+2)=
6:2*3=
6*0.5*3=
9

Quote

It can't be neither 1 or 9
1.You beginn with the bracket, so 1*2 and 2*2
2.Then we get this 6/2+4
3.the result is then 7

why all the trouble to remove brackets and then forgetting you have to do so with both in a division.

6/2*(X+Y)=6*0.5*(X+Y)=3*(X+Y)=3X+3Y. in this case 9.

Edited by conductiv, 21 June 2013 - 03:56 PM.


Arkhell #8 Posted 21 June 2013 - 03:51 PM

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View Postconductiv, on 21 June 2013 - 03:50 PM, said:

answer is 9, divide and multiply are mathematical equals so have to be taken in turn. part between brackets is done first.

so it is
6:2*(1+2)=
6:2*3=
6*0.5*3=
9

jepn this one is true

Gehoth #9 Posted 21 June 2013 - 03:57 PM

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Oh God....

___eXPLOSIVo___ #10 Posted 21 June 2013 - 03:59 PM

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So hard, isn't it?:D And it seems just like a simple task.

ssgtom #11 Posted 21 June 2013 - 04:06 PM

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View Postilosz, on 21 June 2013 - 03:49 PM, said:

It can't be neither 1 or 9

1.You beginn with the bracket, so 1*2 and 2*2
2.Then we get this 6/2+4
3.the result is then 7

Well, I explained the right answer before... I can imagine that some People accidently think it could be 1, which is a mistake easy to do.

But your answer is completely... well wtf???

I just try to figure what you are trying to tell us. I guess you tried to solve the last part of the term

... 2 * ( 1+2)

and you rewrote it as

... 2 * 1 + 2 * 2

but how the hell do you get 4 out of this???

... 2 * 1 + 2 * 2
=  2 + 4
= 6

Always thought a answer only could be right or wrong, but yours is the wrongest :P

ilosz #12 Posted 21 June 2013 - 04:14 PM

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View Postssgtom, on 21 June 2013 - 04:06 PM, said:

Well, I explained the right answer before... I can imagine that some People accidently think it could be 1, which is a mistake easy to do.

But your answer is completely... well wtf???

I just try to figure what you are trying to tell us. I guess you tried to solve the last part of the term

... 2 * ( 1+2)

and you rewrote it as

... 2 * 1 + 2 * 2

but how the hell do you get 4 out of this???

... 2 * 1 + 2 * 2
=  2 + 4
= 6

Always thought a answer only could be right or wrong, but yours is the wrongest :P
Srry it is too hot,I can't even think now :teethhappy:

conductiv #13 Posted 21 June 2013 - 04:22 PM

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View Postssgtom, on 21 June 2013 - 04:06 PM, said:

Well, I explained the right answer before... I can imagine that some People accidently think it could be 1, which is a mistake easy to do.

But your answer is completely... well wtf???

I just try to figure what you are trying to tell us. I guess you tried to solve the last part of the term

... 2 * ( 1+2)

and you rewrote it as

... 2 * 1 + 2 * 2

but how the hell do you get 4 out of this???

... 2 * 1 + 2 * 2
=  2 + 4
= 6

Always thought a answer only could be right or wrong, but yours is the wrongest :P

na he tried removing brackets.

6/2*(2+1)
removing brackets (the error): 2*1+2*2=2+4
placing back into equation 6/2+4
solve in order, first divide then add up: 6/2+4 = 6/2=3 followed by  3+4=7

while you get 1 by prioritizing * over /.
you also get weird answers by fragmenting the bracket removal (first solving 2*(2+1) as (4+2) with the next step 6/4+6/2=1,5+3=4,5)

there are many errors to be made that can give you complete bullocks answers on simple questions

TheDOD #14 Posted 21 June 2013 - 04:33 PM

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Simple: You take the brackest first so its

6 / 2 * (1+2) = 6 / 2 * 3

And then you go from lef to right and get

6 / 2 * 3 = 3 * 3= 9

MeetriX #15 Posted 21 June 2013 - 05:13 PM

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3rd grade math. :great:

Fedajkin1989 #16 Posted 21 June 2013 - 05:21 PM

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View PostWorldOfWar, on 21 June 2013 - 03:59 PM, said:

So hard, isn't it?:D And it seems just like a simple task.

no it's not hard, it's also extremely old and boring

LigthWolf #17 Posted 21 June 2013 - 05:29 PM

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6:2(1+2)

6:2*(1+2)

6:2*3

6:6

1


gg

TheDOD #18 Posted 21 June 2013 - 05:46 PM

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View PostLigthWolf, on 21 June 2013 - 05:29 PM, said:

6:2(1+2)

6:2*(1+2)

6:2*3

6:6

1


gg

But the multiplication and division is in same order. In this case you have 6 / 2 * 3. Since none of them are more important then the other, then you take it in normal order, ei from left to right

MeetriX #19 Posted 21 June 2013 - 06:10 PM

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6÷2(1+2)
(6÷2)*((1+2))
(6÷2)*(3)
3*3
OMG! It's full of stars.

Edited by MeetriX, 21 June 2013 - 06:10 PM.


___eXPLOSIVo___ #20 Posted 21 June 2013 - 06:27 PM

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View PostFedajkin1989, on 21 June 2013 - 05:21 PM, said:

no it's not hard, it's also extremely old and boring

Well, everything is interesting for one time only. And if anything's old then it doesn't mean it's not interesting for those who hadn't seen it before.... Btw don't forget to vote down this post also like you did all what I wrote because you don't like this topic.  :sceptic:





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