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?

You Throw The Outside, Cook The Inside
Eat The Outside, Throw The Inside.

What Is It?

I have four wings but can't fly.
I express no emotions.
I am found on the exact spot every time you look.
I keep toiling away with a little sound.

Do you know what am I?

A mad serial killer kidnaps people and forces them to play the game of 2 pills with them, In this game, there are pills in the table and one of them is normal pill while the other one is deadly poisonous.
The victim will choose one pill and the killer will pick the other pill and both simultaneously will swallow the pill with water.
victim dies every time.

One day the serial killer kidnaps the Joseph and forces him to play the same game with him.

Joseph solves the mystery of the two pills and remains alive.

Explain?

I speak without a mouth, and hear without ears. I have no-body, but I come alive with the wind. What am I?

Can you find out the remainder when 3^300 is divided by 5?

Spelt forwards I’m what you do every day, spelled backwards I’m something you hate. What am I?

Which word is least like the others? Third, fourth, fifth, sixth, seventh, eighth, ninth?

How can you drop a raw egg from a height onto a concrete floor without cracking it?

What number comes next in this sequence:
7 8 5 5 3 4 4 _