What is so fragile that saying its name breaks it?

How many times do a clock's hands overlap in a day ?

The captain of a ship was telling this interesting story: "We travelled the sea far and wide. At one time, two of my sailors were standing on opposite sides of the ship. One was looking west and the other one east. And at the same time, they could see each other clearly." How can that be possible?

In the given figure, move three matchsticks so that the resulting figure contains two rectangles.

If "P" means "-", "Q" means "/", "R" means "+", and "S" means "*" then find the value of the following:

21 Q 7 R 9 S 10 P 13

What is the largest amount of money that you can possess in change and still if someone asks you for a dollar, you won't be able to give?

Why do people go to bed?

An equation has been laid down using a few matchsticks. However, as you can see, the equation is not correct. Can you correct the equation if you are allowed to add or remove 5 matchsticks?

Identify the hidden meaning behind this picture?

Name one eight-letter word with 'kst' in the middle, 'in' the beginning, 'and' at the end.?