What do you call a fish without an eye?

Find the missing number in the sequence below:

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?

I am a five-letter word and people eat me. If you remove the first letter I become an energy form. If you remove the first two letters, I am needed to live. Scramble the last three letters and I am a drink. What word am I?

Two old friends, Jack and Jill, meet after a long time, and discussing as:

Jack: Hey, how are you, man?

Bill: Not bad, got married and I have three kids now.

Jack: That's awesome. How old are they?

Bill: The product of their ages is 72 and the sum of their ages is the same as your birth date.

Jack: Cool..But I still don't know.

Bill: My eldest kid just started taking piano lessons.

Jack: Oh, now I get it.

How old are Bill's kids?

Identify the hidden meaning behind this picture?

Forwards I am heavy, backward I am not. What am I?

The centre of the third figure is empty. What digit should fit inside?

Find the hidden tiger in the given optical illusion ?

I make a loud sound when I’m changing. When I do change, I get bigger but weigh less. What am I?