Ace school

with brainly

  • Get help from millions of students
  • Learn from experts with step-by-step explanations
  • Level-up by helping others

A community for students.

Using the digit 7 five time, place the basic arithmetic signs in between the digits to obtain a total of 540

Mathematics
I got my questions answered at brainly.com in under 10 minutes. Go to brainly.com now for free help!
At vero eos et accusamus et iusto odio dignissimos ducimus qui blanditiis praesentium voluptatum deleniti atque corrupti quos dolores et quas molestias excepturi sint occaecati cupiditate non provident, similique sunt in culpa qui officia deserunt mollitia animi, id est laborum et dolorum fuga. Et harum quidem rerum facilis est et expedita distinctio. Nam libero tempore, cum soluta nobis est eligendi optio cumque nihil impedit quo minus id quod maxime placeat facere possimus, omnis voluptas assumenda est, omnis dolor repellendus. Itaque earum rerum hic tenetur a sapiente delectus, ut aut reiciendis voluptatibus maiores alias consequatur aut perferendis doloribus asperiores repellat.

Join Brainly to access

this expert answer

SEE EXPERT ANSWER

To see the expert answer you'll need to create a free account at Brainly

nice question.....
I know, it's been driving me nuts
can you join two 7s together to form 77?

Not the answer you are looking for?

Search for more explanations.

Ask your own question

Other answers:

Nah, you gotta put the signs in between each one
You're going crazy, aren't you?
this question is right r u sure?
because if it is not then bad things will happen
Yeth, I'm pretty sure it's the question
And now everyone's thinking...
It would be fast to do with computer code, any one good with programming ?
certainly question of the week
yes certainly
if it doesn't get solved here put it in the meta-math section for future reference
I've really been trying this for a while and I think it's messed up anyone else think it's impossible?
as in, it's total overload here
i'm not sure if this fits the rules but 77 x 7 + (7 / 7) gives 540
+ - / and * only, right? no squaring or anything?
concatenation isn't arithmetic right? nice work jimmyrep btw
jimmyrep, if no one can find a solution without the placing two 7s together, I'll use your solution
ok
i don't think you can do it without joining two 7s together, jimmy rep has the right answer.
77 is probably not allowed
jimmy rep yehh 77 not allowd
It's probably not, but if it isn't I think it's impossible. I've been over this for over two hours, can't do anything to solve it. Yes, two hours, that's how obsessed I am with this question.
these types of question are obsessive!
Yep
you can't do it because 540 is not divisible by 7.
I KNEW IT! All that time wasted, I COULD'VE BEEN PLAYING TETRIS!
lol
Sweet baby turtles, I can't believe I missed that fact
that doesn't make a difference, you can make four 5's into 26 even though 26 is not divisible by 5 5*5+(5/5)
Oh I see.....
in jimmy's example, he used 7/7 to add 1...
Oh, yeah, then my time HASN't been a complete waste
Good observation...
are parentheses allowed?
I would think so... it's just multiplication
Yeah
i was thinking maybe there was an order of operations trick to solving it or something... grasping at straws :-)
You don't need them though, order of operations takes care of the problem above.
yes - i didn't need the parenthesis
It all depends on if digits can be stacked without operations (is 77 valid?) - in which case 7*77+7/7 works as jimmyrep mentioned
question y u no make sense? ლ(ಠ益ಠლ)
I feel like concatenation is needed here though. I'm not sure there's another way to grow the number fast enough while reserving 7/7 to make the difference of 1 you need to get to 540 itself.
this is certainly a crap question because 540 is not divisible by 7 and i advise ppl to stop wastin time on it
I already pointed out that the fact that 540 is not divisible by 7 makes no difference, read above
the problem is sitting in meta-math now, so it can be viewed in the future by someone who can figure this out, or prove it to be impossible.
Sooooooo, you can't get a straight answer right?
not here, not now...
this is correct answer
Bummer huh
Oh, well, guys I don't want to completely waste all your time
So, if everyone please get together with the plan and just randomly give everyone you can medals!
Like I say, check the meta-math section in the future, someone will probably either find the answer or prove it impossible... eventually.
Thanks, to everyone, for all the help
what an awesome way to waste time
:)
Well, medals or wasted time right? Might as well
but to prove it impossible without a computers help is going to be interesting
moneybird has a knack for this kind of thing, but he's not around.
Yep, but it's gonna take a looot of time and luck
Yeah, something about koalas that makes him as smart as he is
jejeje...
yo
why r ppl still on this question, u u ppl stil solving it?
I'm thinking it is impossible: adding 7/7=1 is the only way I can see to get to a number that is not divisible by 7, which only leaves three 7's left over, and the most we can make that into is 7*7*7=343 taking 540-(7/7)=539 and 539/7=77 hence it seems jimmyrep's answer is the only one possible, but I don't think this is a true proof that it is impossible.
I tried a bunch of different ways, and I can't find an answer. Now I have a Chem Final in 45min., and this problem is all I'll be thinking of!
JIMMY IS CORRECT :P

Not the answer you are looking for?

Search for more explanations.

Ask your own question