Each card below has a letter on one side and a number on the other.
The Rule Is: If a "J" is on one side, the opposite side MUST be an "8".
Which cards MUST be flipped to test if the rule is true?
If the "J" card needs to be flipped,
ADD 857 to the North Coordinates and ADD 723 to the West Coordinates
If the "K" card needs to be flipped,
ADD 168 to the North Coordinates and SUBTRACT 589 from the West Coordinates
If the "5" card needs to be flipped,
SUBTRACT 810 from the North Coordinates and SUBTRACT 1014 from the West Coordinates
If the "8" card needs to be flipped,
SUBTRACT 217 from the North Coordinates and ADD 490 to the West Coordinates
They say that 90% of people get this puzzle wrong. I know that I did, but will you? Of course you could just try all 16 possible answers but come on, you're better than that aren't you?