# 1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 – 1 + 1 + 1 + 1 + 1 + 1 + 1 x 0 = ?

Home Forums Yeshiva / School / College / Education Issues 1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 – 1 + 1 + 1 + 1 + 1 + 1 + 1 x 0 = ?

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• #602523

YitB
Member

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.

#1125319

TheGoq
Participant

I believe the answer is zero.

#1125320

nitpicker
Participant

14 using algebraic rules for order of operations. but those are a convention for convenience.

performin in sequence, without knowing or caring about those rules,

#1125321

yentingyenta
Participant

#1125322

Feif Un
Participant

14

#1125323

BTGuy
Participant

Zero?

Hi nitpicker.

You are saying the same equation in Algebra would be 14?

Can you work that out and demonstrate?

I am curious.

#1125324

nishtdayngesheft
Participant

14.

First you mutliply, thaen you do the addition and subtraction. (Unless the string was in parenthesis)

#1125325

sam4321
Participant

14, classic PEMDAS .

#1125326

Think first
Member

Anything times zero is zero.

#1125327

Shticky Guy
Participant

15×0=0

#1125328

But 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.

#1125329

zen3344
Participant

1 + 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.

#1125330

zen3344
Participant

Sam, for other’s edification:

P = Parens

E = Exponents

M = Multiplication

D = Division

S = Subtraction

#1125331

nitpicker
Participant

to btguy.

Hi

by now others have posted explanations.

#1125332

zen3344
Participant

Woman Outside…there’s a -1 in there, so it’s 14.

#1125333

Avram in MD
Participant

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!

#1125334

Participant

I say 14 also

Pemdas (Please excuse my dear Aunt Sally)

#1125335

Luna Lovegood
Participant

#1125336

nitpicker
Participant

to avram in MD

you seem to be arguing with me, but there is not much difference in what you said and what I said.

#1125337

does your dear aunt sally think cherry pies delicious apple pies are too?

#1125338

popa_bar_abba
Participant

I say PEMDAS also.

Perchance Embalm My Dog And Swan?

#1125339

Avram in MD
Participant

nitpicker,

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:-)

#1125340

dd
Member

#1125341

Participant

Moski,

Huh?

#1125342

sam4321
Participant

Coffee Addict: it is another mnemonic, Circumference = pi * diameter = cherry pie delicious. Apple Pies are square or round : Area =P * r2,Area = p*r*r.

#1125343

haifagirl
Participant

Of course it’s 14.

#1125344

Participant

Oh cool,

I never heard that one

#1125345

nitpicker
Participant

to 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.

#1125346

BTGuy
Participant

Hi nitpicker.

I really knew how to get the answer. Just wanted to see if you did.

lol

; )

#1125347

Luna Lovegood
Participant

YitB –

#1125348

supergirl613
Member

Ok I say either 0 or 3 and I have no clue how you got 14!

#1125349

Think first
Member

To 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.

#1125350

Participant

Ooooh,

Ill take the bet! (Why did you have to mess it up unnamed mod)

#1125351

Participant

What 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.

#1125352

kbluhm
Member

Think First, how much are you willing to bet? Multiplication take precedence over addition and subtraction. First you’d multiply `1 x 0`, which is `0`. Then you perform all addition and subtraction, which yields `14`. I’m not sure why I am writing this as it was clearly stated over and over… yet you somehow managed to overlook it. 😉

#1125353

haifagirl
Participant

Can I get in on that bet, too? I could also use a little extra money before Pesach! 😉

#1125354

nfgo3
Member

This 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.

#1125355

supergirl613
Member

OK 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+1-1+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)10-1=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!!

#1125356

YitB
Member

@ Luna Lovegood

“YitB –

The answer is 14 using PEMDAS. There is no other correct answer.

#1125357

tmlbluedove
Member

d0 it backwards

0x1=0 1+1+1+1+1=5 1+1+1+1+1+1+1+1+1+1=10-1=9

#1125358

yeshivaguy45
Participant

15 you do multiplication first

1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 – 1 + 1 + 1 + 1+ 1 + 1 + (1×0)

#1125359

YW Moderator-42
Moderator

42

#1125360

🍫Syag Lchochma
Participant

and thanks for all the fish.

#1125361

haifagirl
Participant

yeshivaguy45: Read the problem again. You missed a minus.

#1125362

You need an Einstein to calculate this scientific equation.

#1125363

Toi
Participant

#1125364

yeshivaguy45
Participant

Maybe 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

#1125365

haifagirl
Participant

yeshivaguy45: 14 + 0 = 14. (1 x 0 = 0)

Believe me. Just call me publicschoolgirl. 😉

#1125366

yeshivaguy45
Participant

haifagirl I see what you’re talking about. Thanks

#1125367

Curiosity
Participant