You may enter, but you may not come in. I have space, but no room. I have keys, but open no lock. What am I?

What 8 letter word can have a letter taken away and it still makes a word. Take another letter away and it still makes a word. Keep on doing that until you have one letter left. What is the word?

2, 3, 5, 9, 17, _ What is the next number in the sequence?

What is in seasons, seconds, centuries and minutes but not in decades, years or days?

Living above a star, I do not burn
Eleven friends and they do not turn
I can just be visited in a sequence, not once or repeatedly
PQRS are my initials
Can you tell my name accurately?

You are in a land where thirty men and two women were dressed in classic black and white dresses.
They begin to fight as soon as any of them move.

Where are you?

Can you replace the question mark with the correct number?

John can place six large boxes or nine small boxes into a carton.

Can you find out in how many cartons can he place sixty-six boxes in total?

A pond had 60 fish, out of which, all but 20 died.
How many fishes are now present in that pond?

Solve the below puzzle by replacing the question mark with the correct number.

3 6 12

4 8 16

5 10 ?