Why Aeroplane windows are round?

What does does this rebus picture means ?

Find the next number in the series below

21 32 54 87 131 ?

Can you find the missing number in the third row?
35 20 14
27 12 18
5 2 ?

If 5 cats catch 5 mice in 5 minutes, how long will it take one cat to catch a mouse?

James ordered a fishing rod, priced at $3.56. Unfortunately, James is an Eskimo who lives in a very remote part of Greenland and the import rules forbid any package longer than 4 feet to be imported. The fishing rod was 4 feet and 1 inch, just a little too long, so how can the fishing rod be mailed to James without breaking the rules? Ideally James would like the fishing rod to arrive in one piece!

Two men play a dice game involving roll of two standard dice. Man X says that a 12 will be rolled first. Man Y says that two consecutive 7s will be rolled first. The men keep rolling until one of them wins.

What is the probability that X will win ?

How can you leave a room with two legs and return with six legs?

By moving just one matchstick, you need to make the below statement true. Can you do it?

Can you name four days which start with the letter 'T'?