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## Wednesday, January 30, 2008

### 7 and 7 and 7 and 7 is 56

Using four 7s and any of the basic arithmetic operators (+, -, x, ÷) can you make 56?

7    7    7    7 = 56

Roman said...

I can't think of any other way:

(7/7+7)*7 = 56

Anonymous said...

This is not possible using ONLY the basic mathematical operations: addition, subtraction, multiplication and division. Roman's answer shows the solution, but this is only possible if the use of brackets is allowed.

Craig said...

7 x 7 + 7 + - 7 = 56

Anonymous said...

You are wrong. That is forty nine.

Anonymous said...

Anonymous said...

7+7-7x7+7=56

Anonymous said...

Anonymous said...

can i use paranthysis?

if yes then,
(7/7+7)*7 = 56

Anonymous said...

you should all learn how to spell "you're"

Anonymous said...

-_- o.O hmmm if only it was 3 7's then it would be 7x7+7=56

do u think they added a extra 7?

Anonymous said...

ooooo

i know the answer so dang easy and took some time

it

is

...

seems like you'd rather keep on trying

sooo

i will not post the answer

so ya
^-^

Anonymous said...

i got the answer......its....7divided by 7 plus 7 times 7.thank you

sonia said...
This comment has been removed by the author.
Anonymous said...

thats not correct, coz if there are no parenthesis then you have to multiply and divide first..so in 7 divided by 7 plus 7 times 7, we would have to divide and multiply BEFORE we add or subtract..it would become 1 plus 49 = 50. so the earlier post is incorrect!

Anonymous said...

poopie cuz i have an extra credit thing for school. and i have to get 56 using 4 7's.... no parenthesis

Anonymous said...

nihar--
answer is 7/7=1, 1+7=8, 8*7=56

Anonymous said...

7 divided by 7 = 1
1+7=8
8x7=56

arun said...

here's my answer for those who got it wrong

7*(7+(7/7))=56

Anonymous said...

OWNED!

Metal D said...

It depends on how many processes we can use.

If we can go through one at a time, we can say.
7/7=1
1+7=8
8*7=56

4 7's and 3 processes.

This is just like the numbers round in countdown Countdown (UK gameshow).

They allow free use of brackets so I think answers to this should allow it, too.

Carly said...

7+(7/7)+(7x7)-7=
7 + 1 + 49 - 7 =
50

multiplicações e divisões primeiro, somas e subtrações depois.

Dsh said...
This comment has been removed by the author.
Mike Mould said...

7=7x7+7=56

Mike Mould said...

I came up with this answer only because of the clues of somehow eliminating one seven without eliminating it from the equation.

Judy Chung said...

7 x 7 7/7

Unknown said...

7×7÷7+7×7= 56

Anonymous said...

The answer is clearly:
(7/7+7)x7 which equals 56
For people that have no clue what the slash represents:( it is an algebraic expression for division. Thanks for reading:)

Anonymous said...

That is definitly not true at all! Your not right because ... order of operations witch best describes that equals 50.

Anonymous said...

Um.. I wouldn't say so at all, that does not seem right to me. Could you justify your answer?

Anonymous said...

... can't now

Mistay said...

OMG FINALLY (7÷7+7)x7

7÷7 = 1,
1+7 = 8
Then do 8 x 7 = 56 :D

A guy said...
This comment has been removed by the author.
Not me said...

Ur an idiot 7-7 is 0 and anything times 0 is ZERO