Why is it against the law for a man living in Delhi to be buried in Mumbai?

What will be the best approach to finding all the prime numbers less than 75 that leave an odd reminder when we divide them with 5?

You are presented with three boxes. One of them has a red ball inside and the other two have a black ball inside each of them. You are asked to pick up the one with red ball and you pick one. Now, one of the other boxes is opened and it is found to have a black ball.

You are presented with a chance to change your box with the one that is left closed. Will you change your box? Why or why not?

In an Art Gallary, When the clock hit 11 am, Artist hung the painting number 30. When it struck 4 pm, he hung painting number 240 and when it struck 7:30 pm, he hung painting number 315.

Can you determine, which painting number will he hang when the time is 9:20 pm?

It comprises roots which nobody sees,
Much taller than those trees,
Up and up it goes,
Still it never grows?

During which month do people sleep the least?

What is the next number in this matchsticks series riddle?

How many Watermelons are there in the below picture?

A man was driving a black truck. His lights were not on. The moon was not out. A lady was crossing the street. How did the man see her?

Eight of us go fourth, not back, to protect our king from an attack. What are we?