What is the fastest way to double your money?

Name a key which is hardest to turn.

In the picture given below, can you find out which digit will take place of the question mark?

Use only one mathematical symbol and all numbers (0-9) to get a sum of 99

If there are fifteen crows on a fence and the farmer shoots a third of them, how many crows are left?

One is to three as three is to five and five is to four and four is the magic number.
What is the pattern?

Why Aeroplane windows are round?

A man fell off a smuggling boat into deep water. He could not swim and he was not wearing anything to keep him afloat. It took 30 minutes for the people on the boat to realize someone was missing. The missing man was rescued two hours later on the return trip. Why didn't he drown? Note:- He didn't know swimming, the sea was deep, and He wasn't holding anything

Can you find the 09 errors in the picture below?

While house hunting in London, I came across a very good leasehold property Discussing the lease the landlady told me:

'The property was originally on a 99 years lease and two-thirds of the time passed is equal to four-fifths of the time to come. Now work it out for yourself and see how many years are to go!