Four men were in a boat on the lake. The boat turns over, and all four men sink to the bottom of the lake, yet not a single man got wet! Why?

I am lying and I always lie. Tell me whether I am lying or telling the truth.

What are the 50th, 63rd and 100th numbers in the sequence below?
4, 5, 8, 8, 9, 9, 12, 13, 13, 13, 17, 18, ...

You’re out on the water and see a boat filled with people. You look away for a second and look back again, but this time you don’t see a single person on the boat. Why? Hint: The boat did not sink.

What can you see in the middle of March and April that you can never see in any other month?

Six glasses are in a row. The first three are filled with milk and the last three are empty. By moving only one glass, can you arrange them so that the full and the empty glasses alternate?

The day before yesterday I was 25 and the next year I will be 28. This is true only one day in a year. What day is my birthday?

If you drop me I’m sure to crack, but give me a smile and I’ll always smile back. What am I?

A man says, "Brothers and sisters, have I none, but that man's father is my father's son." Who is that man?

There was a man he lives in a hotel each morning he presses the first floor button each evening if there is a person in the elevator he asks him to press the 10 floor button if there is no one in the elevator he takes the stairs why.