what are 12 numbers with a minimum of 50 a maximum of 57 a mode of 56 and a median of 54
one = 50 and another = 57
It is negatively skewed, tail to the left, because median < mode.
At least two, but probably more, must be 56, the mode. Half must be higher than 54 and half lower, because it is the median. Scores of 54 would be counted on both sides.
That should give you a start.