Can you count the number of matches in the picture below ?

I know a country, If you remove the last alphabet of its name, it will become a part of your body. Do you name it?

A man lives on the fifteenth floor of an apartment building. Every morning he takes the elevator down to the lobby and leaves the building. In the evening, he gets into the elevator, and, if there is someone else in the elevator, or if it was raining that day, he goes back to his floor directly. Otherwise, he goes to the tenth floor and walks up five flights of stairs to his apartment. Can you explain why he does this?

Mr Black, Mr Gray, and Mr White are fighting in a truel. They each get a gun and take turns shooting at each other until only one person is left. Mr Black, who hits his shot 1/3 of the time, gets to shoot first. Mr Gray, who hits his shot 2/3 of the time, gets to shoot next, assuming he is still alive. Mr White, who hits his shot all the time, shoots next, assuming he is also alive. The cycle repeats. If you are Mr Black, where should you shoot first for the highest chance of survival?

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

Why do we preferably have round manhole covers and not square ones?

Before Mount Everest was discovered, what was the highest mountain in the world?

Can you find a rabbit in the given picture?

What's a single-digit number with no value?

Nine marbles are arranged in the image below. Can you slide two marbles to form a square?