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

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

You walk into a room that contains a match, a kerosene lamp, a candle and a fireplace. What would you light first?

If Rajina's daughter is my daughter's mom, who am I to Rajina?

Can you identify the direction in which this bus is moving; left or right?

Hint: The bus is moving on the roads of London.

In a stable, there are men and horses. In all, there are 22 heads and 72 feet. How many men and how many horses are in the stable

There are 2 cops parked along a one-way street looking for traffic violations. They spot a taxi driver going in the wrong direction, yet they do nothing.

Why?

If we tell you that there is a relation between the numbers and letters in the given figure, can you analyze it and find the missing letter in the last box?

Find a 9-digit number, which you will gradually round off starting with units, then tenth, hundred etc., until you get to the last numeral, which you do not round off. The rounding alternates (up, down, up ...). After rounding off 8 times, the final number is 500000000. The original number is commensurable by 6 and 7, all the numbers from 1 to 9 are used, and after rounding four times the sum of the not rounded numerals equals 24.

Which number should replace the question mark?