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

I have two coins.
* One of the coins is a faulty coin having a tail on both sides of it.
* The other coin is a perfect coin (heads on side and tail on other).

I blindfold myself and pick a coin and put the coin on the table. The face of the coin towards the sky is the tail.

What is the probability that another side is also tail?

What is the difference between a jeweller and a jailer?

This puzzle is for Harry Potter fans. Do you know why Tom Riddle is called Lord Voldemort?

No matter how little or how much you use me, you change me every month. What am I?

There are 2 people near the river and both of them want to get on the other side. The boat can only take one of them. But they got across.
How?

If 5 cats catch 5 mice in 5 minutes, how long will it take one cat to catch a mouse?

Find the hidden panda in the image below.

A guy in his thirties is found dead in a forest. The shocking thing about the body is that he is wearing his swimming trunks snorkel and a facemask.

For your information, the nearest lake is some 10 miles away and the sea is hundreds of miles away.

How did he die then?

We can be boring,Or interesting.
We can be long,Or short.
We can have pictures,Or just words.
Many love us,But many also hate us.
What are we?