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

Question

turingtest · Answer

without using 77, there mus be an operation between each number!

anonymous · Answer

is it possible to get it mathematically? or just guess? :D

anonymous · Answer

it should be impossible

anonymous · Answer

wild guess

turingtest · Answer

I'm thinking it is impossible:
adding or subtracting 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 formal proof that it is impossible.

-jimmyrep's answer was 77*7+(7/7)

anonymous · Answer

there r a total of 256 combinations,

and as far as a human mind can think,

none of these 256 is the right solution.

but again its intitution which is being used here

anonymous · Answer

77*7 + 7/7