When my father was 31 I was 8. Now he is twice as old as me. How old am I?

Why do people go to bed?

Can you place three balls such that the equation shown in the picture holds true?

Find out the missing number in the picture attached:

I never was there, I am always to be.
You have never ever seen me, not ever you will.
Yet I am the confidence of everyone.

Who Am I?

What brings you down but never up?

I am the first thing you need while camping.
I am always with the person named Marcos Valencia and Carrick.
But Pogba Zlatan and Rooney think I am wasteful and do not need me.
I am the second to the last thing to add when you are making a patch.

What am I?

What has 88 keys?

It has a long neck, A name of a bird, Feeds on cargo of ships, It's not alive,

What is it?

There's one "sport" in which neither the spectators nor the participants know the score or the leader until the contest ends.

What is it?