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Calling all math gurus..... |
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8shots ![]() Optics Jedi Knight ![]() ![]() Lord Of The Flies Joined: March/14/2007 Location: South Africa Status: Offline Points: 6060 |
![]() ![]() ![]() ![]() ![]() Posted: November/14/2018 at 00:18 |
The question doing the rounds:
6 divided by 2(1+2) = 9 or 1???( I cannot find the divide symbol on the pute) I get 9 but my brother is adamant it is 1. Despite the rules of equations as I know them I cannot convince him otherwise. Or am I wrong??
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supertool73 ![]() Optics God ![]() ![]() Superstool Joined: January/03/2008 Status: Offline Points: 11070 |
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If you follow order of operations. You start with parenthesis. So (1+2) is 3. That leaves you 6/2(3) Now they all have the same precedence so its just left to right. 6/2 is 3 and then 3*3 is 9. So i say you are correct.
But if you take the 2*3 you would get 1. Seens like a trick question depending on who u ask |
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Dogger ![]() Optics Jedi Knight ![]() ![]() Joined: January/02/2007 Location: Ontario, Canada Status: Offline Points: 5581 |
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Doesn't multiplication take precedence over division?
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Kickboxer ![]() MODERATOR ![]() ![]() Moderator Joined: February/13/2008 Status: Offline Points: 20173 |
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PEMDAS = Parentheses, exponents, Multiplication and Division (same level, left to right) and Addition and Subtraction (same level left to right)... so: 6/2*(1+2)= 6/2*3 (the parentheses disappear) = (using the rule above) 3*3= 9
there is no precedence in the operations of multiplication/division or addition/subtraction other than left to right order (unless, of course, inside parentheses) |
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Opinion,untempered by fact,is ignorance.
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8shots ![]() Optics Jedi Knight ![]() ![]() Lord Of The Flies Joined: March/14/2007 Location: South Africa Status: Offline Points: 6060 |
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Googling a bit I have come across the matter of "binding: So 6/2(1+2) can be solved as
6/ (2(2+1)) 6/(2*3) 6/6=1 Apparently the ( ) binds the 2 to the 1+2 , so that multiplication becomes stronger then the BOMDA rule. If it was written as 6/2*(1+2) the BOMDA rule would give 9. It appears as though there is not just one answer. Only if the rules of interpreting the equation is agreed upon can it be solved with only 1 answer. Mathematicians apparently favour 1 as the answer.
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BeltFed ![]() Optics God ![]() ![]() Joined: February/12/2008 Location: Ky Status: Offline Points: 18585 |
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Looks like 9 the way I learned math.
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Life's concerns should be about the 120lb pack your trying to get to the top of the mountain, and not the rock in your boot.
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Son of Ed ![]() Optics Retard ![]() ![]() Joined: June/18/2011 Location: TEXAS Status: Offline Points: 64922 |
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![]() " Remember how good you were at math in high school, Eduardo..." |
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Son of Ed ![]() Optics Retard ![]() ![]() Joined: June/18/2011 Location: TEXAS Status: Offline Points: 64922 |
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Son of Ed ![]() Optics Retard ![]() ![]() Joined: June/18/2011 Location: TEXAS Status: Offline Points: 64922 |
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Son of Ed ![]() Optics Retard ![]() ![]() Joined: June/18/2011 Location: TEXAS Status: Offline Points: 64922 |
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![]() " So Eduardo gets a job in the oilfield putting out blowouts...." ![]() Edited by Son of Ed - November/15/2018 at 18:53 |
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Son of Ed ![]() Optics Retard ![]() ![]() Joined: June/18/2011 Location: TEXAS Status: Offline Points: 64922 |
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![]() Edited by Son of Ed - November/15/2018 at 18:53 |
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Kickboxer ![]() MODERATOR ![]() ![]() Moderator Joined: February/13/2008 Status: Offline Points: 20173 |
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Applying the distributive rule (which is the appropriate approach), you get: 6/2(1+2) = 6/(2 + 4) = 6/6=1 |
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Opinion,untempered by fact,is ignorance.
There are some who do not fear death... for they are more afraid of not really living |
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Dogger ![]() Optics Jedi Knight ![]() ![]() Joined: January/02/2007 Location: Ontario, Canada Status: Offline Points: 5581 |
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"Unless of course you're trying to calculate the equation in Ed's alternate universe in which case no rules of logic apply"
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tahqua ![]() MODERATOR ![]() ![]() Have You Driven A Ford Lately? Joined: March/27/2006 Location: Michigan, USA Status: Offline Points: 8510 |
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Very basic programming =6/(2*(1+2)).............voila 1
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Doug
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8shots ![]() Optics Jedi Knight ![]() ![]() Lord Of The Flies Joined: March/14/2007 Location: South Africa Status: Offline Points: 6060 |
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Thanks...my brother and I are no longer on speaking terms....all because of a 1 or a 9!!!
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supertool73 ![]() Optics God ![]() ![]() Superstool Joined: January/03/2008 Status: Offline Points: 11070 |
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Again it is a trick question designed to cause disagreements. In your case to destroy brotherly love.
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Lifetime warranty and excellent customer service don't mean a thing when your gun fails during a zombie attack.
"A Liberal is a person who will give away everything they don't own." |
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mike650 ![]() Optics God ![]() ![]() Joined: May/14/2006 Location: West of Rockies Status: Offline Points: 13577 |
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Fish to Live, Live to Hunt
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Sparky ![]() Optics Master Extraordinaire ![]() Joined: July/15/2007 Location: SD Status: Offline Points: 3892 |
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If the problem was stated 6 divided by 2(1+2) =. It is 1 since the 2(1+3) is treated as a quantity. If it was stated as 6/2*(1+2)=. It is 9 since operations within the parentheses are performed first then the / * operations are performed left to right.
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tahqua ![]() MODERATOR ![]() ![]() Have You Driven A Ford Lately? Joined: March/27/2006 Location: Michigan, USA Status: Offline Points: 8510 |
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Sparky, drop it in Excel or Fortran
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Doug
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mike650 ![]() Optics God ![]() ![]() Joined: May/14/2006 Location: West of Rockies Status: Offline Points: 13577 |
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Winner! ^^^. 🍻 |
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Fish to Live, Live to Hunt
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tahqua ![]() MODERATOR ![]() ![]() Have You Driven A Ford Lately? Joined: March/27/2006 Location: Michigan, USA Status: Offline Points: 8510 |
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Right
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Doug
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Sparky ![]() Optics Master Extraordinaire ![]() Joined: July/15/2007 Location: SD Status: Offline Points: 3892 |
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It depends on how the problem is entered as to what answer you get. If entered 6/2*(1+2)= on a scientific calculator it is 9. Edited by Sparky - November/15/2018 at 15:32 |
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Sparky ![]() Optics Master Extraordinaire ![]() Joined: July/15/2007 Location: SD Status: Offline Points: 3892 |
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SVT_Tactical ![]() TEAM SWFA - Admin ![]() ![]() Chief Sackscratch Joined: December/17/2009 Location: NorthCackalacky Status: Offline Points: 30242 |
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"Most folks are about as happy as they make their minds up to be" - Abraham Lincoln
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SVT_Tactical ![]() TEAM SWFA - Admin ![]() ![]() Chief Sackscratch Joined: December/17/2009 Location: NorthCackalacky Status: Offline Points: 30242 |
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More than one way to skin a cat
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"Most folks are about as happy as they make their minds up to be" - Abraham Lincoln
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