How many ways can 3 numbers be chosen from 6? 6C3=20 ways
So there are 20 ways to chose two sets of 3 numbers.
Put each triplet in increasing order and put the one with she smallest number in the top left corner.
Now only half of those will have the second column in ascending order so that cuts it down to 10ways
But only half of those 10 will have the third culumn in ascending order so
There will be 5 possible outcomes.