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

Why Aeroplane windows are round?

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?

You have two strings whose only known property is that when you light one end of either string it takes exactly one hour to burn. The rate at which the strings will burn is completely random and each string is different.

How do you measure 45 minutes?

The Puzzle: A girl, a boy, and a dog start walking down a road.

They start at the same time, from the same point, in the same direction.

The boy walks at 5 km/h, the girl at 6 km/h.

The dog runs from boy to girl and back again with a constant speed of 10 km/h. The dog does not slow down on the turn.
How far does the dog travel in 1 hour?

Who is that with a neck and no head, two arms and no hands? What is it?

I can write cow in 13 letters.

Can You?

I know a ten-letter word in the English language which can be typed using only the top rows of the computer keyboard.

How many triangles can you find in this given picture?

A girl is twice as old as her brother and half as old as her father. In 50 years, her brother will be half as old as his father. How old is the daughter now?