Find the next number in the sequence

5 12 24 36 ?

There are three boxes on a table. One of the box contains Gold and the other two are empty. A printed message contains in each box. One of the message is true and the other two are lies.

The first box says "The Gold is not here".

The Second box says "The Gold is not here".

The Third box says "The Gold is in the Second box".

Which box has the Gold?

How many letters are in the alphabet?

4 fathers, 2 grand-fathers and 4 sons went to watch the movie.What is the minimum number of tickets they need to buy ?

Can you find out who is the kidnapper in below Picture and why, Explain ?

Two-person want to cross a river. Only one boat is present on the riverside that can carry only one person at a time.

However, they still manage to cross the river. How is it possible?

I have an eye but still cannot see.

Who am I?

What Time Should the last watch show in the below figure?

Count the number of triangles in the picture below:

I’m orange, I wear a green hat and I sound like a parrot. What am I?