We have 5 dice, 4 of these dice are the same, the fifth is not. find it!

The dice that we are examining are shown in the attached picture.

Now, notice the pattern shown on each dice.
You will find that the pattern is 6,5 and 4.

Now, notice the way that this pattern is ordered. You will find that:
for dice a,b,c and e : the pattern is shown in a clockwise direction order
for dice d: the pattern is shown in an anti-clockwise direction order.

This means that: dice D is the different one