What has hands, but can’t clap?

In front of you, there are 9 coins. They all look absolutely identical, but one of the coins is fake. However, you know that the fake coin is lighter than the rest, and in front of you is a balance scale. What is the least number of weightings you can use to find the counterfeit coin?

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

What Adam and Eve do not have but the rest of the people have?

what does the below rebus means?

You see a mathematical expression in the picture. Can you think of a movie that this expression refers to?

On a charity event in Russia, Murray beat Djokovic by winning six games and losing three games.
Note: There is a total of 5 service breaks(one who serve lost the game).
Who served first, Djokovic or Murray?

Can you find out the remainder when 3^300 is divided by 5?

1 + 9 + 8 = ?
considering, 28 + 8 + 92 = 10

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?