The following questions are designed to consider what are the odds or probabilities of something happening and then to frame that in the context of identifying collisions in hash functions.
What are the odds of being struck by lightening?
What are the chances of winning the United Kingdom National Lottery?
What are the chances of a random DNA match?
What are the chances of 100 coin consecutive resulting in tails?
What are the chances of being killed by a shark?
What is the number of possible values generated by the Message Digest 5 algorithm?