Can you find out the next digit in the following series ?

0, 0, 1, 3, 2, 6, 3, 9, 4, 12, 5, ?

Which is the smallest number that you can write using all the vowels exactly once?

This is a classy optical illusion puzzle. What more you can find except bricks in the image below?

A journalist was investigating a sacred cult in the jungles of Africa when he was caught by one of the person. He was confined in a cave till the leader arrived. The leader told him that he need to tell him a statement. If he thinks the statement is true, then the journalist head will be chopped off. If he thinks that the statement is false, his head will be smashed with a hammer.

What statement did the journalist make to survive?

I have a head like a cat and feet like a cat, but I am not a cat. What am I?

A girl was standing near the window thinking something. All of a sudden she decides something and throws something out of the window. She dies very soon after throwing it. She was perfectly healthy and had no disease or allergy. No one killed her and she did not commit suicide.

Can you think of any possible explanation that is logical as well for what happened there?

Move four matchsticks to the below square to form three squares?

Spot what is wrong here in below Picture?

Things are just as they seem, right? Well, check again.
Can you count the number of tigers in this picture ?

Can you place three balls such that the equation shown in the picture holds true?