I am a seven-letter word but if you remove four of my letters I will have one left. What word am I?

What mathematical symbol can be put between 5 and 9, to get a number bigger than 5 and smaller than 9?

Until it is measured, not known. Yet how you miss it when it has gone. What is it?

One fine day, an intellectual man came to the emperor's court with the aim of testing Birbal's wittiness. In order to do this, he challenged Birbal to answer his question and hence prove that he was as intelligent and witty as he was said to be.
He asked Birbal, Do you want me to ask one difficult question or a hundred easy ones?
Since both Akbar and Birbal had had a tough day and were eager to leave, Birbal hastily told the intellectual to ask him a single difficult question.
Intellectual: OK. Tell me what came first into the world, the egg or the chicken?
Of course, the chicken, Birbal replied with a smile.
This time with a note of victory in his voice, the intellectual asked Birbal, How will you demonstrate that?
What did Birbal say?

Replace the question mark with the correct number.

John replied, when asked how old he was. In 2 years he will be twice as old as he was five years ago.' How old is he ?

What do the following words have in common?

Assess
Banana
Dresser
Grammar
Potato
Revive
Uneven
Voodoo

Find the next number in the series?
2, 12, 36, 80, 150, 252, 392, _ ?

Find out the number of circles in the given picture having Illusion

A sea diver is a real show-off. He showed everyone that he can hold his breath underwater for 15 minutes.

I went to the diver and told him that I can be underwater for double the time i.e 30 minutes.
He responded that he will give me 100$ if I would be able to do it. I won 100$.

What did I do?