The doctor advised his patient to take a tablet after every fifteen minutes. He gave him five tablets in total.

How much time will he take to have all the five tablets?

What has many teeth, but cannot bite?

John has played 50 ODI's and his average is 50. How many runs should he score in his 51st ODI, so that his average score jumps to 51?

Irene killed hundreds of people mercilessly and yet the police were not able to put her behind the bars. Why?

You are given with the following sum. Each of the letters can be decoded as a digit. If we tell you that D = 5, then can you solve it entirely?

DONALD
+GERALD
=ROBERT

While going to your grandmother's house, you counted Twenty houses on the right side. While returning back to your home, you counted Twenty houses on the left side.

How many houses are there between your home and your grandmother's home?

Many have heard it, but nobody has ever seen it, and it will not speak back until spoken to. What is it?

The answer I give is yes, but what I mean is no. What was the question?

What mathematical symbol can be put between 5 and 9, to get a number bigger than 5 and smaller than 9?

I can turn polar bears white.
I can make anyone dance.
I can make everyone cry
I can make your hands clap
I can make you thin.
I can make you smile.
I can make you smile

Can you guess the riddle?