Prove that twice of ten is the same as twice of eleven.

How much will a 38° angle measure when looked at under a microscope that magnifies ten times?

Your mother’s brother’s only brother-in-law is asleep on your couch. Who is asleep on your couch?

A mother bought three dress for her triplets daughters(one for each) and put the dresses in the dark. One by one the girls come and pick a dress.
What is the probability that no girl will choose her own dress?

What is the next number in the series?

15 29 56 108 208 ?

What can you catch but never throw?

Can you name some countries which do not have the alphabet 'A' in them?

In the attached figure, you can see a chessboard and two rooks placed on the chess board. What you have to find is the number of squares that do not contain the rooks. How many are there?

What goes up but never comes down?

You have two buckets of 11 liters and 6 litres.
How can you measure exactly 8 litres?