1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 – 1 + 1 + 1 + 1 + 1 + 1 + 1 x 0 = ?
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March 16, 2012 1:46 pm at 1:46 pm #602523YitBMember
Do you think you know the answer to this?
At first just post an answer, just so we can see what everyone thinks then later we can discuss the reasons.
It’s really sad to see around the web how many people are getting it wrong.
March 16, 2012 4:42 pm at 4:42 pm #1125319TheGoqParticipantI believe the answer is zero.
March 16, 2012 4:57 pm at 4:57 pm #1125320nitpickerParticipant14 using algebraic rules for order of operations. but those are a convention for convenience.
performin in sequence, without knowing or caring about those rules,
the answer is 0.
March 16, 2012 5:00 pm at 5:00 pm #1125321yentingyentaParticipantisnt the answer 0?
March 16, 2012 5:11 pm at 5:11 pm #1125322Feif UnParticipant14
March 16, 2012 5:14 pm at 5:14 pm #1125323BTGuyParticipantZero?
Hi nitpicker.
You are saying the same equation in Algebra would be 14?
Can you work that out and demonstrate?
I am curious.
March 16, 2012 5:17 pm at 5:17 pm #1125324nishtdayngesheftParticipant14.
First you mutliply, thaen you do the addition and subtraction. (Unless the string was in parenthesis)
March 16, 2012 5:34 pm at 5:34 pm #1125325sam4321Participant14, classic PEMDAS .
March 16, 2012 5:42 pm at 5:42 pm #1125326Think firstMemberAnything times zero is zero.
March 16, 2012 5:45 pm at 5:45 pm #1125327Shticky GuyParticipant15×0=0
March 16, 2012 5:47 pm at 5:47 pm #1125328A Woman Outside BrooklynParticipantBut there are no parenthesis in this equation, so the addition/subtraction is equal to the last part. I thought it was 15, may have counted wrong.
March 16, 2012 5:50 pm at 5:50 pm #1125329zen3344Participant1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 – 1 + 1 + 1 + 1 + 1 + 1 + 1 x 0 =
14.
Using order of operations, you’d multiply the last 1 x 0 first, resulting in 0, so you’d have:
1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 – 1 + 1 + 1 + 1 + 1 + 1 + 0 = 14.
If, however, the equation was:
(1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 – 1 + 1 + 1 + 1 + 1 + 1 + 1) x 0 =
The result is 0, as you would perform the operations in parens FIRST and multiply that result by 0, giving you the result that Think First came up with but incorrectly in this instance.
March 16, 2012 5:53 pm at 5:53 pm #1125330zen3344ParticipantSam, for other’s edification:
P = Parens
E = Exponents
M = Multiplication
D = Division
A = Addition
S = Subtraction
March 16, 2012 5:54 pm at 5:54 pm #1125331nitpickerParticipantto btguy.
Hi
by now others have posted explanations.
March 16, 2012 5:54 pm at 5:54 pm #1125332zen3344ParticipantWoman Outside…there’s a 1 in there, so it’s 14.
March 16, 2012 6:11 pm at 6:11 pm #1125333Avram in MDParticipantThe answer is 14.
but those are a convention for convenience.
Not really, they’re a convention so that anyone else looking at the equation can be clear what it means. Otherwise, what’s to say we can’t interpret the above as:
(1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 1) – (1 + 1 + 1 + 1 + 1 + 1 + 1*0) = 4
or
(1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 1) – (1 + 1 + 1 + 1 + 1 + 1 + 1)*0 = 10
or 0, as several people above said, etc…
Without a common set of rules and definitions, we can’t have symbolic math!
March 16, 2012 6:23 pm at 6:23 pm #1125334☕️coffee addictParticipantI say 14 also
Pemdas (Please excuse my dear Aunt Sally)
March 16, 2012 6:41 pm at 6:41 pm #1125335Luna LovegoodParticipantthe Answer is 0
March 16, 2012 6:42 pm at 6:42 pm #1125336nitpickerParticipantto avram in MD
you seem to be arguing with me, but there is not much difference in what you said and what I said.
March 16, 2012 6:48 pm at 6:48 pm #1125337DoodleMan™Memberdoes your dear aunt sally think cherry pies delicious apple pies are too?
March 16, 2012 6:53 pm at 6:53 pm #1125338popa_bar_abbaParticipantI say PEMDAS also.
Perchance Embalm My Dog And Swan?
March 16, 2012 7:56 pm at 7:56 pm #1125339Avram in MDParticipantnitpicker,
you seem to be arguing with me, but there is not much difference in what you said and what I said.
I certainly didn’t intend to bother you with an argument. Convenience (the term you used) indicates something that eases difficulty, but does not imply requirement. I contend that the order of operations are a requirement, not a convenience or “best practice.” To perform the calculation above “in sequence”, therefore in my view, is incorrect. That’s all I was trying to say. Sorry for nitpicking:)
March 16, 2012 8:03 pm at 8:03 pm #1125340ddMemberThis is sad. A dispute about a 6th grade arithmetic problem.
March 16, 2012 8:14 pm at 8:14 pm #1125341☕️coffee addictParticipantMoski,
Huh?
March 16, 2012 9:14 pm at 9:14 pm #1125342sam4321ParticipantCoffee Addict: it is another mnemonic, Circumference = pi * diameter = cherry pie delicious. Apple Pies are square or round : Area =P * r2,Area = p*r*r.
March 17, 2012 6:08 pm at 6:08 pm #1125343haifagirlParticipantOf course it’s 14.
March 18, 2012 1:20 am at 1:20 am #1125344☕️coffee addictParticipantOh cool,
I never heard that one
March 18, 2012 2:55 am at 2:55 am #1125345nitpickerParticipantto Avram in MD
I didn’t mean that having a convention was merely a convenience, but that the particular conventions chosen were for convenience.
with a different set of rules, you would need far more symbols and annoying and confusing parentheses when writting formulas or equations.
these rules are convention, not a natural fact of numbers or arithmetic, as you yourself mention.
March 21, 2012 5:51 pm at 5:51 pm #1125346BTGuyParticipantHi nitpicker.
I really knew how to get the answer. Just wanted to see if you did.
lol
; )
March 21, 2012 9:46 pm at 9:46 pm #1125347Luna LovegoodParticipantYitB –
do have an answer for us or are we gonna be thinking about this problem for the rest of our live wondering what the answer is?
March 21, 2012 11:28 pm at 11:28 pm #1125348supergirl613MemberOk I say either 0 or 3 and I have no clue how you got 14!
March 22, 2012 7:31 am at 7:31 am #1125349Think firstMemberTo all those who said fourteen, what’s 15×0? Well that’s the question. There 1+1 10 times that equals 10 then there’s 1 so ur at 9 there’s +1 another 6 of them so let’s see 9+6=15 but boom you want me to multiply that by zero so basicaly its 15×0 and anything times 0 always equals 0. And I’d bet on this.
read the other replies on this thread. PEMDAS.
March 22, 2012 10:24 am at 10:24 am #1125350☕️coffee addictParticipantOoooh,
Ill take the bet! (Why did you have to mess it up unnamed mod)
March 22, 2012 11:35 am at 11:35 am #1125351dullradianceParticipantWhat is the context of this arithmatic question?
If I use these symbols on my calculator, the answer displays a zero.
If I use these symbols in a fortran program, the answer displays a 14.
If I warn an eight year old that this is a trick question – s/he will answer 14.
If I ask a grandparent the answer will probably be – Huh?
If the answer is needed for a d’var torah, the answer could be 13, 14, 15, 5 or zero.
March 22, 2012 2:17 pm at 2:17 pm #1125352kbluhmMemberThink First, how much are you willing to bet? Multiplication take precedence over addition and subtraction. First you’d multiply
1 x 0
, which is0
. Then you perform all addition and subtraction, which yields14
. I’m not sure why I am writing this as it was clearly stated over and over… yet you somehow managed to overlook it. 😉March 22, 2012 7:11 pm at 7:11 pm #1125353haifagirlParticipantCan I get in on that bet, too? I could also use a little extra money before Pesach! 😉
March 22, 2012 9:09 pm at 9:09 pm #1125354nfgo3MemberThis is a cute trick for elementary algebra students. If any bochur graduates high school without knowing the answer, there is something seriously wrong with his chinuch.
March 22, 2012 10:28 pm at 10:28 pm #1125355supergirl613MemberOK I know 14 comes in the picture and if you do it right, the the answer is clearly 14, and it’s not 1 or 3,4,5,10,13,15 or whatever # you guys wrote. This is how it works:
1+1+1+1+1+1+1+1+1+11+1+1+1+1+1+1×0
1)multiply the 0 and the 1 at the end of the problem=0(but remember once we multiplied the 1 and the 0 we aren’t using them anymore so they are out of the picture!)
then u add the 1st 10 1s=10
Are you with me so far? Because 0+10=10!
then we have a 1 which everyone(I hope knows)101=9
Ok so now our present answer is 9. so now we are gonna add up the remaining 5 #’s to get 14.
Did you guys get it?
I hope it was clear!
Btw:CLASSIC PEMDAS!!
March 23, 2012 3:08 pm at 3:08 pm #1125356YitBMember@ Luna Lovegood
“YitB –
do have an answer for us or are we gonna be thinking about this problem for the rest of our live wondering what the answer is?”
The answer is 14 using PEMDAS. There is no other correct answer.
October 1, 2012 1:16 am at 1:16 am #1125357tmlbluedoveMemberthe answer is 14
d0 it backwards
0x1=0 1+1+1+1+1=5 1+1+1+1+1+1+1+1+1+1=101=9
October 3, 2012 1:40 am at 1:40 am #1125358yeshivaguy45Participant15 you do multiplication first
1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 – 1 + 1 + 1 + 1+ 1 + 1 + (1×0)
October 3, 2012 4:31 am at 4:31 am #1125359YW Moderator42Moderator42
October 3, 2012 4:33 am at 4:33 am #1125360🍫Syag LchochmaParticipantand thanks for all the fish.
October 3, 2012 8:33 am at 8:33 am #1125361haifagirlParticipantyeshivaguy45: Read the problem again. You missed a minus.
October 3, 2012 1:28 pm at 1:28 pm #1125362You need an Einstein to calculate this scientific equation.
October 3, 2012 2:31 pm at 2:31 pm #1125363ToiParticipantthe answer is 67.43. i asked haifagirl.
October 3, 2012 3:16 pm at 3:16 pm #1125364yeshivaguy45ParticipantMaybe I’m crazy but I keep on doing this problem and I keep on coming out to 15. 1+1=2 +1=3 +1=4 +1=5 + 1=6 + 1=7 + 1=8 + 1=9 + 1=10 – 1=9 + 1=10 + 1=11 + 1=12 + 1=13 + 1=14 + (1 x 0)=15
October 3, 2012 4:29 pm at 4:29 pm #1125365haifagirlParticipantyeshivaguy45: 14 + 0 = 14. (1 x 0 = 0)
Believe me. Just call me publicschoolgirl. 😉
October 3, 2012 4:51 pm at 4:51 pm #1125366yeshivaguy45Participanthaifagirl I see what you’re talking about. Thanks
October 3, 2012 9:34 pm at 9:34 pm #1125367CuriosityParticipantThis thread is so sad.

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