Can you start the fire using two pieces of wood?

Why Aeroplane windows are round?

A professor thinks of two consecutive numbers between 1 and 10.
'A' knows the 1st number and 'B' knows the second number

A: I do not know your number.
B: Nor do I know your number.
A: Now I know.

What are the four solutions for this?

They do not possess flesh or feathers or scales or bone
But still, they are blessed with fingers and thumbs of their own.

A train leaves from point A for point B at 80 mph. After half an hour, another train leaves from point B for point A at 60 mph.

Which of the trains will be farther from point A when they meet ?

By moving exactly three matchsticks can you make the below equation true.It can be solved by 3 ways.

How many cubic feet of dirt are in a hole of one foot deep, three feet long, and two feet wide?

A lion and its tamer are standing inside a cage that measures 1 unit in radius. Both of them can effortlessly run at the speed of 1 unit maximum.

1) Suppose the lion is hungry, will he be able to eat up the tamer?
2) If yes, how long can the tamer survive?

Three doctors said that Bill was their brother. Bill says he has no brothers. How many brothers does Bill actually have?

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?