What is the next number in the series?

15 29 56 108 208 ?

As easy as you can get into me, it is as hard to get out of me.

Do you know what I am?

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?

You walk into a room and see a bed. On the bed, there are two dogs, five cats, a giraffe, six cows, and a goose. There are also three doves flying above the bed. How many legs are on the floor?

The person who makes it has no need for it; the person who buys it has no use for it. The person who uses it can neither see nor feel it. What is it?

Tell me the Hindi name of a Vegetable which if we remove 1st word will become a precious Stone and by removing the last word it will become a sweet eatable.

We are a group of eight brothers. We consider the weak, yet we protect the king in every battle. If we move ahead, we never turn back. Who are we?

How can a man go eight days without sleep?

My thunder comes before the lightning; my lightning comes before clouds; my rain dries all the land it touches. What am I?

How many people must be gathered together in a room, before you can be certain that there is a greater than 50/50 chance that at least two of them have the same birthday?