There's a probability question I saw on the web that looks innocent enough, unless you pay attention to the wording: I have two dice. If i roll them until i get a double, which is the most likely roll to get a double on? The answer given is below: The first roll is the most likely. Heres why First Roll: 1/6 Chance to get Double. 5/6 Chance to not get double Total Chance: 1/6 Second Roll 5/6 Chance to Reach This Stage 1/6 Chance to get double Total Chance = 5/36 Third Roll 25/36 Chance to Reach This Stage 1/6 Chance to get double Total Chance = 25/216 You get the idea. This carries on. The answer makes sense to me, but probably due to the wording of the question, I am still slightly inclined to think that the answer is "equally likely". Note that the person will stop rolling the dice when he hits a double. What do you think?