What English word has three consecutive double letters?

If an electric train is travelling south, then which way is the smoke going?

Can you replace the question mark with the correct letter?

6 + 6 + 6 = N
7 + 7 + 7 = E
8 + 8 + 8 = R
0 + 0 + 0 = ?

How many bananas can you eat if your stomach is empty?

Solve the mathematical equation in the picture below.

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?

Count the squares in the matchstick puzzle below?

While handling a project, the landscaper is asked by the owner of the mansion that he wants four trees in front of his mansion that are exactly equidistant from each other.

How will he do it?

Find out the missing number in the picture attached:

Solve the below puzzle by replacing the question mark with the correct number.

3 6 12

4 8 16

5 10 ?