This is not hard, but fun.
Suppose you have a die such that its 1,5,6 and 4 face are broken. Whenever 1 face lands, it gets rolled over to an adjacent face. If 5 face lands, it is equally likely that it may stick or get rolled over to the adjacent face. If 4 lands, it has 1/4 probability of rolling over to the adjacent face. While if 6 shows up it always sticks. (EDIT: Not to confuse 6 is no different from 2,3. They behave like regular die faces.That 6 statement is just to provide element to the puzzle.)
(By land I mean on top)
What is the probability of getting 4 on this die?