2, 3, 5, 9, 17, _ What is the next number in the sequence?

In the given figure, you can see that four match sticks are used to form a square. Can you form five squares by using six matches?

Who is that with a neck and no head, two arms and no hands? What is it?

Without looking at a calendar, within a minute name, a boy's name using 5 consecutive 1st letters of 5 consecutive months

A mother is 21 years older than her child. In exactly 6 years from now, the mother will be exactly 5 times as old as the child.
Where's the father?

I live in a bowl. I can swim. I have a tail. I also have fins and big eyes. What am I?

A large container is kept in open under the rain. Every passing hour, the water collected inside the container becomes double what it was.

In ten hours, the container is filled completely. Can you calculate how long would it have taken to be filled in half?

A bag contains 64 balls of eight different colours. There are eight of each colour (including red). What is the least number you would have to pick, without looking, to be sure of selecting 3 red balls?

What is the end of everything?

I have no doors but I have keys, I have no rooms but I have space, you can enter but you can’t leave! What am I?