Replace the question mark with the correct number in the below-given picture?

There are 3 apples in the basket and you take away 2. How many apples do you have now?

Name a key which is hardest to turn.

I am the beginning of the end, and the end of time and space. I am essential to creation, and I surround every place. What am I?

This is a famous paradox which has caused a great deal of argument and disbelief from many who cannot accept the correct answer. Four balls are placed in a hat. One is white, one is blue and the other two are red. The bag is shaken and someone draws two balls from the hat. He looks at the two balls and announces that at least one of them is red. What are the chances that the other ball he has drawn out is also red?

It is an eleven letter word.
The first, second, third and fourth letters form a banquet's name.
The fifth, sixth and seventh letters form a car's name.
The eighth, ninth, tenth and eleventh letters form a mode of transport.

Can you identify what word it is?

Always in you, Sometimes on you;

If I surround you, I can kill you.

What am I?

Can you convert the number zero(0) into a positive number using just one mathematical operator ?

It's a test that will check your IQ.

Suppose you have one 11 minute hourglass and one 13 minute hourglass.

Can you measure exactly fifteen minutes using them ?

Which five letter word can be added at the end of below word to form a
valid word?

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