How many people must be gathered together in a room, before you can be certain that there is a greater than 50/50 chance that at least two of them have the same birthday?

I have lakes with no water, mountains with no stone and cities with no buildings. What am I?

The cream is heavier than Milk. True or False?

Find the number of squares in the below-given picture.

What word is pronounced the same if you take away four of its five letters?

There was a man he lives in a hotel each morning he presses the first floor button each evening if there is a person in the elevator he asks him to press the 10 floor button if there is no one in the elevator he takes the stairs why.

What 5-letter word typed in all capital letters can be read the same upside down?

You need to complete the maze by entering from the entrance marked below in the figure near the yellow circle, bottom left and leaving from the exit point near the green circle, bottom middle.

Rule of Game: You can move only by exchanging green and yellow circles.

I don't get anymore wetter, no matter how much rain falls on me.

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