What is the next number in the series?

15 29 56 108 208 ?

There is something which is always coming but never arrives?

There is something which you can be arrested for attempting but not for successfully completing.

Take away my first letter, then take away my second letter. Then take away the rest of my letters, yet I remain the same. What am I?

In four steps you need to move the word 'cold' From 'warm' by replacing one alphabet at a time such that every word formed at each step is acceptable in English Dictionary.

One night, Louis and Adam were sitting together. Adam was watching a movie while his wife Louis was reading a mystery book. Suddenly the power went out and Adam decided to go to bed, but strangely Louis kept on reading. There was no artificial light around, so Louis kept on reading. How come?

There was a strange boy who was born before his father. How can this be possible?

If "P" means "-", "Q" means "/", "R" means "+", and "S" means "*" then find the value of the following:

21 Q 7 R 9 S 10 P 13

I have a five and a three-gallon jar. Assuming there is an infinite supply of water, how can I measure one-gallon water?

Which tank will fill first?