1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 – 1 + 1 + 1 + 1 + 1 + 1 + 1 x 0 = ?
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 This topic has 139 replies, 71 voices, and was last updated 2 years, 9 months ago by ubiquitin.

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July 11, 2014 6:44 pm at 6:44 pm #1125420👑RebYidd23Participant
That’s not beauty. That is why I hate math, always hated it, always will, and if I was born again I’d still hate it. Also, I canceled PEMDAS so it is no longer in effect.
July 11, 2014 7:03 pm at 7:03 pm #1125421arifreeParticipantOK but there’s just one problem. Now that you messed up all of math, Shabbos started 5 hours ago and tomorrow is Wednesday.
July 11, 2014 7:58 pm at 7:58 pm #1125422oomisParticipantDid I just misspell PERCEIVE?
July 11, 2014 8:58 pm at 8:58 pm #1125423Miriam377ParticipantTeacher? PLEASE EXCUSE MY DEAR AUNT SALLY. I’m sure she didn’t mean it.
July 11, 2014 9:08 pm at 9:08 pm #1125424ubiquitinParticipantNope oomis, that was all me.
Please don’t let that distract from the crux of my point though.
In fact perhaps it can add:
I cant just reply well “It depends on how you perceive the fifth and sixth letters of the word” Spelling, like math, has rules. and “percieve” is simply wrong; much as any response other than 14 is simply wrong as a solution to the OP’s problem.
July 11, 2014 9:12 pm at 9:12 pm #1125425arifreeParticipantDon’t feel so bad everyone. The Phantom Tollbooth also gets it wrong on page 188.
July 13, 2014 3:01 am at 3:01 am #1125426oomisParticipantI am SOOOOOOOO confused now!
July 13, 2014 9:31 am at 9:31 am #1125427haifagirlParticipantI can’t believe you’re still debating this. Go open up any math book. You people do know what books are, don’t you?
July 13, 2014 11:22 am at 11:22 am #1125428notwhouthinkiamMemberForget algebra. (Where does it come in? There are no missing figures? I believe that algebra is only used trying to find out a missing figure.) Using the most basic and simple way to do math, because there are no parenthesis PEMDAS would not be used and the answer be 0.
July 13, 2014 1:19 pm at 1:19 pm #1125429👑RebYidd23ParticipantNo, PEMDAS works this way: If you want the order to follow PEMDAS, write PEMDAS before anything else: PEMDAS 1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 – 1 + 1 + 1 + 1 + 1 + 1 + 1 x 0 = ?. If not, write just plain 1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 – 1 + 1 + 1 + 1 + 1 + 1 + 1 x 0 = ?.
July 13, 2014 2:45 pm at 2:45 pm #1125430my own kind of jewParticipantPEMDAS is a rule for mathematics whether it’s written there or not.
Only following that when it says PEMDAS there would be the same as only making a brocha on food if the food was labeled with “brocha”
July 13, 2014 10:18 pm at 10:18 pm #1125431arifreeParticipantnotwhouthinkiam That’s like saying if you have a book without a table of contents, go back to the end of the book and read backwards to the beginning.
July 13, 2014 11:36 pm at 11:36 pm #1125432notwhouthinkiamMemberArifree, a book is made to read from beginning to end. (you dont really need a table of contents.) In mathematics, there are different ways how to get a solution to different kinds of problems, but you could ony use that formula if its in the right situation. And since there are no parenthesis then you would just go on to do the problem the regular way.
July 14, 2014 1:51 am at 1:51 am #1125433arifreeParticipantSince there are no parentheses you multiply first. That is what ORDER of operations MEANS.
July 14, 2014 10:39 am at 10:39 am #1125434IvduEsHashemBsimchaParticipantSummary of things which people don’t understand about this question:
1) Pemdas applies WHETHER IT’S WRITTEN OR NOT!
2) In Pemdas, add/subtract is one group and multiply/divide is one group. Within a group, you do whatever one comes first, left to right.
3) There are no parentheses in this problem. Therefore, the 0 only works on one of the 1s (and the answer is not 0).
4) There is a “1” hidden in there, which many mistook for a “+1”, leading to the false answer of 16.
5) If you plug it in numberbynumber on a calculator (ex: 1+1=? +1=? +1=? , etc.), of course you won’t get 14, because the calculator can’t retroactively multiply the 0 and 1 before everything else. If, however, you put the whole problem into a graphing calculator, or even Google it, you will get 14.
All of these things have been mentioned before on this thread. There is NO correct answer other than 14.
July 14, 2014 8:54 pm at 8:54 pm #1125435👑RebYidd23ParticipantPEMDAS was a rule for mathematics.
July 14, 2014 9:23 pm at 9:23 pm #1125436arifreeParticipantPEMDAS is just a cute way to help you remember the rules. Like SOA CAH TOA for trig identities.
July 15, 2014 11:16 am at 11:16 am #1125437no longer need seminaryMemberthe answer is 0. everything x0 =0!
July 15, 2014 12:40 pm at 12:40 pm #1125438IvduEsHashemBsimchaParticipantn.l.n.s.h. :
You are right that anything times zero equals zero.
However,
Since the rule of Pemdas says that you multiply/divide before you add/subtract, the first step is to multiply the last 1 times 0. That equals zero. However, you still have a bunch of other 1s, which you add/subtract.
THE ANSWER WILL NOT BE 0 BECAUSE ONLY ONE 1 IS x0!!!
Copy and paste it into Google. The answer is 14.
July 16, 2014 9:07 pm at 9:07 pm #1125439arifreeParticipantThe reason why this is hard for people is because while they aren’t mathematicians, they use calculators and cash registers to add things up as they come, all the time. “I have $1. I make $1 and I add it up. Then I spend one dollar and I subtract 1. Eventually it looks like 1+11+1+1…” They don’t wait; they calculate right away.
July 17, 2014 4:40 pm at 4:40 pm #1125440IvduEsHashemBsimchaParticipantMods, don’t you think it’s time to choose this thread? I’d have thought three pages was enough for a simple arithmetic problem. There is nothing to add, and people who still don’t understand should keep looking at the explanatory posts already there.
This is an embarrassment. The answer is 14. Period.
July 17, 2014 9:19 pm at 9:19 pm #1125441👑RebYidd23ParticipantThat’s not true. Some human made up PEMDAS, and I undid that.
July 18, 2014 2:27 am at 2:27 am #1125442klein vikayamMembermath is against my religion, because venishmartem meod linafshosechem:)
July 18, 2014 3:22 am at 3:22 am #1125443arifreeParticipantWell, there is a mitzva to know that Hashem is echad and if you think echad means 2 or 3 because you just undid math…please check out the AZ thread.
July 18, 2014 5:08 am at 5:08 am #1125444frumnotyeshivishParticipantIsn’t this fun, people? Everyone’s opinion is valid. Majority wins with compromise. Democracy. The average answer is around 9. What, no one will compromise? A bunch of partisan fundamentalists here…
July 18, 2014 8:34 am at 8:34 am #1125445arifreeParticipantIsn’t that the problem with Chrishianity? They believe 1+1+1 =1
August 12, 2014 12:56 am at 12:56 am #1125447arifreeParticipantOK here’s a problem to see how good everyone is with this business
Here I have
1 + 2 + 3 – 4 + 5 + 6
Your job is to add parentheses () to the expression in order to get the smallest possible sum and tell me what it is!
August 12, 2014 1:55 am at 1:55 am #1125448☕ DaasYochid ☕Participant(1+2+3)(4+5+6)=9
August 17, 2014 9:56 pm at 9:56 pm #1125449frumnotyeshivishParticipant(1 + 2) (+ 3) ( 4) (+ 5) (+ 6) = 1080
August 18, 2014 2:15 am at 2:15 am #1125450☕ DaasYochid ☕Participantlol
August 18, 2014 2:26 am at 2:26 am #1125451MalbimMemberDaasYochid, it equals u.
January 13, 2016 2:18 am at 2:18 am #1125452helloyiddenMember14
January 13, 2016 2:53 am at 2:53 am #1125453ubiquitinParticipantAh fond memories
The thread that first got me hooked on coffee (room)
I just reread it. IT still boggles my mind how some posters were still arguing and insisting all sorts of responses were correct (other than 14) even after this 5th grade math problem was explained.
January 14, 2016 1:26 am at 1:26 am #1125454Yserbius123ParticipantThat’s why, despite being a Galcianer, I use Reverse Polish Notation.
1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 x + + + + + + + + + + + + + + +
January 14, 2016 5:45 pm at 5:45 pm #1125455HashemisreadingParticipant14
August 1, 2019 4:13 pm at 4:13 pm #1768595ubiquitinParticipantSo apparently it isn’t just coffee room readers struggling wit elementary school math
This problem:
8÷2(2+2) = ?
Seems to be confusing people, with one silly website claiming the problem “Baffles Mathematicians, Physicists”
when of course it doesn’t, if you follow the rules there is only one answer it isn’t ambiguous and there is no debate
I post this as it brought back fond memories of the post that first got me addicted to the magical place that is the coffee room, where people can argue over basic facts
(The answer of course is 16 and only 16 no other answer is correct or partially correct)
August 1, 2019 8:23 pm at 8:23 pm #1768617Yserbius123Participant@ubiquitin the problem with “8÷2(2+2) =” is the inconsistent notation. In general when you use x(y) to multiply, you will use a bar to divide, “8/2(2+2)” which makes it a lot clearer that “2(2+2)” is the denominator and “8” is the numerator.
August 1, 2019 8:25 pm at 8:25 pm #1768618☕️coffee addictParticipantRight ubiq
Pemdas working from left to right
August 1, 2019 8:25 pm at 8:25 pm #1768623Reb EliezerParticipant8/(2(2+2)) = 8 / 2(4) = 8/8 =1
August 1, 2019 8:25 pm at 8:25 pm #1768688Reb EliezerParticipantDY, 615 = 9
August 1, 2019 8:25 pm at 8:25 pm #1768690Reb EliezerParticipantDY, yours ia 9 and arifree’s problem is 9.
August 1, 2019 8:49 pm at 8:49 pm #1768743ubiquitinParticipantYserbius
a. “in general when you use x(y) to multiply, you will use a bar to divide”
I hear, but eh that isnt a real rule
b. ““8/2(2+2)” which makes it a lot clearer that “2(2+2)” is the denominator and “8” is the numerator”
the reverse is true. the way you wrote it is ambiguous and I could hear either way. the way I wrote it is crystal clear with no room for ambiguity8
—— = ?
2(2+2)would equal 1 (hopefully that formatting doesnt get messed up
At any rate the mistake facing most people i not the issue facing most people online, though I do hear were ou are coming from, most people online either dont appreciate the order of operations, OR think multiplication always precedes division (peMDas)
scroll through this thread, where the ambiguities you mentioned arent an issueLaskern, you are sticking in extra parenthesis that arent there .
8/(2(2+2)) = 1 correct
but the way it was written : 8÷2(2+2) = 8÷2(4) = 4(4) = 16August 2, 2019 1:48 pm at 1:48 pm #1768911MenoParticipantAll of these things are stupid. If you want to write something meaningful, write it clearly in a way that doesn’t require the reader to use arbitrary conventions to interpret it correctly.
August 3, 2019 11:57 pm at 11:57 pm #1769062ubiquitinParticipantMeno
What do you mean by “arbitrary conventions” all of math involves “arbitrary conventions” how do you know what the + in “1+2” means? I think it should mean to the power of and the answer is 1 my friend thinks it should mean multiplication, or maybe it should mean put the numbers next to each other but in reverse order so the answer is 21

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