What occurs twice in a week, once in a year but never in a day?

There are two candles. Both will only burn exactly for an hour. How will you use these two candles to measure forty-five minutes?

Do You See It?

Here is a mathematical expression that also secretly tells a movie name. What movie is that?

Can you count the number of triangles in the given picture?

What runs around the whole yard without moving?

A mathematician couple was having a Frappuccino in Starbucks sitting opposite to each other. Suddenly the guy noticed the text written on the paper in front of them and exclaimed that it was wrong. The girl denied it and said it is appropriate. Both are correct. What is written on the paper?

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?

Six glasses are in a row. The first three are filled with milk and the last three are empty. By moving only one glass, can you arrange them so that the full and the empty glasses alternate?

Who is that with a neck and no head, two arms and no hands? What is it?