What work can one never finish?

Can you count the number of matches in the picture below ?

Two girls were born to the same mother, on the same day, at the same time, in the same month and year and yet they're not twins. How can this be ?

A pack of cards has 40 cards. You are blindfolded. Out of 40, 25 cards are facing down while 15 are facing up. You have been asked to divide this pack of cards into two decks - so that each deck contains an equal number of face-up cards. Remember, you are blindfolded.

How will you do it?

A Doctor always sneezes before the rain. Doctor sneezes, Will it rain?

You can take four of the five letters out of this word, but the pronunciation never changes. What is the word?

Once while in his court, King Akbar asked Birbal to write something on a wall that makes one sad when read in good times and makes one happy when read in sad times.

He took only a few moment and wrote something that fit the requirements. What did he write?

An American nightclub called 'The Coconut Grove' had a terrible fire in which over 400 people died. A simple design flaw in the building led to a high death toll. Subsequently, regulations were changed to ensure that all public buildings throughout the country eliminated this one detail, which proved deadly. What was it?

In particular commonwealth games, a female participant won silver and gold medals for a single event.

How can this be possible?

I am an odd number. Take away a letter and I become even. What number am I?