You are presented with three boxes. One of them has a red ball inside and the other two have a black ball inside each of them. You are asked to pick up the one with red ball and you pick one. Now, one of the other boxes is opened and it is found to have a black ball.

You are presented with a chance to change your box with the one that is left closed. Will you change your box? Why or why not?

It's a protector.
It sits on a bridge.
One individual can see directly through it, while others wonder what it hides.

What is it?

If I remove one from eleven it becomes Ten and if I remove one from nine also becomes Ten. How?

what's the probability of getting a king or a queen from a pack of 52 cards?

What word is pronounced the same if you take away four of its five letters?

Find the next number in the series?
2, 12, 36, 80, 150, 252, 392, _ ?

During an experiment, a guy throws a bouncy ball from a 100 feet tall building. The ball has a specific characteristic. Every time it hits the ground, it bounces up halfway.

How many bounces do you think the ball will make before it comes to a stop ?

What is the Surname of Barbie Doll?

You need to arrange three 7 and mathematical symbols to form number 1?

How many times can you subtract the number two from the number fifty?