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

They are the five precious gems of an everyday sort and all can be found on a Tennis Court. Who are they?

Suppose you are sitting in an interview and the interviewee asks you an aptitude question.

You have three buckets with a capacity of 4 litres, 8 litres and 10 litres and you have a large tank of water. Now you have to measure 3 litres of water precisely using those buckets. How will you do it?

I guess 76.8% of readers will like this riddle.

What's the least number of people should read this post?

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

How can a man go eight days without sleep?

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

Find three numbers such that

* When we multiply three numbers, we will get the prime numbers.
* The difference between the second and the first number is equal to the third and second.

I am eight letters long - "12345678"
My 1234 is an atmospheric condition.
My 34567 supports a plant.
My 4567 is too appropriate.
My 45 is a friendly thank-you.
My 678 is a man's name.

What word am I?

One night, Louis and Adam were sitting together. Adam was watching a movie while his wife Louis was reading a mystery book. Suddenly the power went out and Adam decided to go to bed, but strangely Louis kept on reading. There was no artificial light around, so Louis kept on reading. How come?