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

It can't be seen, can't be felt, can't be heard, and can't be smelt.
It lies behind stars and under hills, And empty holes it fills.
It comes first and follows after, Ends life, and kills laughter.
What is it?

The measurement of time, That can't be found on a clock, But can be looked upon on a map.

Who is He ?

What does Alexander the Great and Winnie the Pooh have in common?

A man wants to cross the pit of fire which is 25 feet in length and he has 2 planks(fire resistant) 19 feet in length. How can he cross the pit of fire alive?

500 women soldiers are arranged in an array of ten rows and fifty columns in accordance with their respective heights. Now, the tallest woman from each row is asked to move out in the front. From them, the shortest one is labelled as Alpha. They are then asked to resume their original position.

Now, the shortest woman in each column is asked to come out in front. The tallest among them is labelled as Beta.

Can you find out if Alpha will be taller or Beta?

How many triangles are there in the picture below?

Name one eight-letter word with 'kst' in the middle, 'in' the beginning, 'and' at the end.?

John was gifted a new Hayabusa. He drove x miles at 55mph. Then he drove x+20 miles at 40mps. He drove his bike for 100 minutes. How much distance did he travel?

If you're 8 feet away from a door and with each move you advance half the distance to the door. How many moves will it take to reach the door?