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

What is at the end of a rainbow?

The person who makes it has no need for it. He who purchases it does not use it. The person who does use it does not know they are. What is it?

You can win me and lose me but never buy me
You can not eat me and never want to part with me
I can make you cry or bring you joy
I am not a machine and definitely not a toy
You keep me but i am not forever just yours
You might find me in a case or on a shelf next to a vase
I am hard and i am tall if you bump me i am sure to fall
I am made of different materials and am at many events
If your lucky and fight hard I might be yours
What am I ?

Find the next number in the sequence

1, 2, 6, 21, 88, __?

In a supermarket, there is an intelligent glass pane before a refrigerating unit. This glass pane allows cherries and apples through it but does not allow grapes and Orange to pass through it.

Can you identify the rule that the glass pane is following?

Can you think of any three-dimensional shape that comprises of exactly two surfaces?

No one wants to have it, but if one got it, he does not want to lose it. What is It?

As a whole I am both
safe and secure.

Behead me and I become
a place of meeting.

Behead me again and I am
the partner of ready.

Restore me, and I become
the domain of beasts.

What am I?

I am a prime number.
The double of myself is equal to the square of me.

which number am I?