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-   -   6/2*(1+2)=? (https://www.musicbanter.com/games-lists-jokes-polls/56077-6-2-1-2-a.html)

Stone Birds 04-29-2011 08:32 PM

seven pages of this... what has the forum come to especially when i'm pretty sure we've had threads related to order of operations before

Janszoon 04-29-2011 09:18 PM

Quote:

Originally Posted by oojay (Post 1045341)
The nearly universal mathematical convention dictates the following order of operations (in order of which operators should be evaluated first):

Factorial.
Exponentiation.
Multiplication.
Division.
Addition.
Any parenthesized expressions are automatically higher ``priority'' than anything on the above list.

Considering that the site you quoted forgets to mention subtraction altogether, I don't see it as the most reliable source of information.

CanwllCorfe 04-29-2011 10:08 PM

Quote:

Originally Posted by oojay (Post 1045537)
6/2*(1+2) = 6/2*(3) = 6/6 = 1

By multiplying the 2 by 3, wouldn't that mean you're pairing it with the divisor? Even if you did multiplication first, shouldn't you be multiplying 6 by 3? And then getting 18, then dividing by 2? Thereby getting 9.

http://i392.photobucket.com/albums/p...g?t=1304136614

The 1 is unnecessary, but I wanted to add it so that everything would line up nicely in Photoshop.

midnight rain 04-29-2011 11:28 PM

Haha this is great, oojay just got schooled completely by canwllcorfe who makes an excellent point. Fifty bucks says he still refuses to admit he's doing it completely wrong

He appears to think the the equation reads as 6/(2*(1+2)), but its obviously how canwll's doing it. And that's only if you ignore the PEMDAS rule, which clearly puts multiplication and division on the same level.

Kirby 04-30-2011 01:14 AM

Quote:

Originally Posted by oojay (Post 1045322)
You can LOL all you want, but the answer is 1, not 9. Read a math book.

I'm lol'ing because I have, and the PEMDAS rule says you're wrong.

http://edu.glogster.com/media/5/25/75/42/25754207.jpg

TheBig3 04-30-2011 09:14 AM

Quote:

Originally Posted by CanwllCorfe (Post 1045557)
By multiplying the 2 by 3, wouldn't that mean you're pairing it with the denominator? Even if you did multiplication first, shouldn't you be multiplying 6 by 3? And then getting 18, then dividing by 2? Thereby getting 9.

http://i392.photobucket.com/albums/p...g?t=1304136614

The 1 is unnecessary, but I wanted to add it so that everything would line up nicely in Photoshop.

Where would you multiply 6 by 3? I got 1, and I'm not seeing your logic.

TheBig3 04-30-2011 09:15 AM

Quote:

Originally Posted by Stone Birds (Post 1045543)
seven pages of this... what has the forum come to especially when i'm pretty sure we've had threads related to order of operations before

You posted in "The Worst Music You Will Ever Hear" before this. I'll stick to math.

MoonlitSunshine 04-30-2011 09:25 AM

I still say that it's ambiguous due to the lack of a standard convention, and that it requires an extra set of parentheses to be exact in the order of evaluation, but hey, there's not much point in beating my head against a brick wall, people can easily read my previous posts in the thread :P

CanwllCorfe 04-30-2011 09:37 AM

Quote:

Originally Posted by TheBig3 (Post 1045707)
Where would you multiply 6 by 3? I got 1, and I'm not seeing your logic.

Well, I don't know how else to say it. :o: 6/2 * 3. You would multiply the 6 by 3, because if you didn't, you'd be pairing it with the divisor. Which would pretty much mean you're doing 6/2 * 1/3, getting 6/6. 3, as a fraction, is 3/1. 6/2 * 3/1 = 18/2 = 9.

EDIT: Here's a picture:

http://i392.photobucket.com/albums/p...fe/mathtos.jpg

You multiply the 6 by 3, getting 18. Then divide by 2.

Burning Down 04-30-2011 09:53 AM

Quote:

Originally Posted by CanwllCorfe (Post 1045713)
Well, I don't know how else to say it. :o: 6/2 * 3. You would multiply the 6 by 3, because if you didn't, you'd be pairing it with the divisor. Which would pretty much mean you're doing 6/2 * 1/3, getting 6/6. 3, as a fraction, is 3/1. 6/2 * 3/1 = 18/2 = 9.

I think I get it, looking at your previous post. You're using multiplication as the main operation here, and then turning it into a simple fraction by using 6x3 as the numerator and 2x1 as the denominator. So, logically, the next step is 18/2, which of course equals 9. Right?


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