Can you convert the number zero(0) into a positive number using just one mathematical operator ?

A prisoner is told: "If you tell a lie, we will hang you and if you tell the truth, we will shoot you." What did the prisoner say to save himself?

A man is surviving on an island along with his friend. They have been starving for four days for food. Suddenly, they find a fisherman. The friend goes with the fisherman in order to catch the fish (if they can find any).

The fisherman returns after some time but he is alone and has some salmon that he had prepared. When asked, the fisherman tells him that his best friend fell off the boat and drowned in the water. Starving for so long, he eats the meal while crying for his friend.

After being rescued, he goes to a diner and orders salmon. When he eats his meal, he jumps and commits suicide. Why did he do it?

You walk into a room that contains a match, a kerosene lamp, a candle and a fireplace. What would you light first?

Solve this riddle by finding the odd one out from the rest.

Can you Find and name the hidden bird in the picture below ?

If a wheel has 54 spokes, how many spaces are there between the spokes?

It is a nine-letter word.
The exact opposite of the phrase "friendly and outgoing"
It contains the word "over".
It starts will a vowel.

What is it?

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

By including only four matchsticks in below picture, you have to make "Four Triangles And Two Squares"