During which month do people sleep the least?

Which digit occurred maximum times between the number 1 and 1000?

How many words can a pen with half refill write?

In the attached figure, you can see a chessboard and two rooks placed on the chess board. What you have to find is the number of squares that do not contain the rooks. How many are there?

What is the fewest number of coins that would be required in order to make sure each and every coin touches exactly three other coins?

Your last good ping-pong ball fell into a narrow metal pipe embedded one foot deep in concrete.
How can you get it out undamaged, if all the tools you have are your tennis paddle, shoe laces, and plastic water bottle, which does not fit into the pipe?

By removing one matchstick and adding one matchstick, can you convert the word "ZOO" to an animal name?

I am a seven-letter word but if you remove four of my letters I will have one left. What word am I?

A deaf and mute man goes to the train station. Tickets for the train are 50 cents each. The man goes to the ticket booth and hands the man inside just a dollar. The man in the booth hands him two tickets.

How did the man in the booth know to give him two tickets without even looking at him?

How much will a 38° angle measure when looked at under a microscope that magnifies ten times?