The title explains it pretty much, make $7777/6666$ equal $-212$. The following operators can be used.
- Each number can only be used once
- You can move the numbers around as much as you want, but the '7777'(and whatever it gets turned into) must stay on the opposite side from the '6666'(and whatever it gets turned into)
- Each operator can be used only once on each side of the fraction(so twice total)
- You can operate with only two numbers at a time.(e.g. you can't do $7-777$, you could do at most $7-7$)
- It is assumed that when two numbers are operated with, they are removed from the equation and then put back in. This is not proper math, but hey, it's a puzzle.(basically, if you wanted to do $7+7$ with the first two 7's, you would do $7+7=14$, then put it back in the problem, leaving you $1477$. Yes, I know it's illogical and improper math, but it's how I made the puzzle, so deal with it.)
- You can round, but only decimals to the nearest 1.
- The only exception to the 4th rule is when dividing the '7777' section(not necessarily 7777) and the '6666' section(not necessarily 6666). In that instance, you divide the whole problem, not just the middle two digits, whatever they are.
Note - () is only for grouping and cannot be used for multiplication in this problem.
Another Note - If there is a negative number in the middle, e.g. $77(-7)7$, this makes the whole thing negative, leaving $-7777$ and eliminating a possible loophole in the third rule.
As an example of the process, this is a sample solution for the equation $8765/4321=\frac15$.
$8\ 7\ 6\ 5\ /\ 4\ 3\ 2\ 1\ =\ \frac15$
$(8\ *\ 7)\ 6\ 5\ /\ (4\ /\ 2)\ 3\ 1\ =\ \frac15$ // Rule 2: you can move the numbers however you want
$`5\ (6`\ -\ 6)\ 5\ /\ (`2`\ * \ 3)\ 1\ =\ \frac15$ // Rule 5: the numbers get inserted back into the puzzle after operations
$(5\ +\ `0`)\ 5\ /\ (`6`\ -\ 1)\ =\ \frac15$
$(`5`\ /\ 5)\ /\ `5`\ =\ \frac15$
$`1`\ /\ 5\ =\ \frac15$
†numbers surrounded by $` `$ are the results of the previous operation
Is there a reason you guys are downvoting? If there is, could you post a comment about why? I know you have enough reputation to comment if you have enough to downvote.