What is the longest word in the dictionary?

My thunder comes before the lightning; my lightning comes before clouds; my rain dries all the land it touches. What am I?

Solve the mathematical equation in the picture below.

I am taken from a mine and shut up in a wooden case, from which I am never released, and yet I am used by almost every person. What am I?

A red house is made out of red bricks. A yellow house is made out of yellow bricks. And, a blue house is made out of blue bricks. So, what is a greenhouse made of?

When it's bad luck to meet a black cat?

What has many teeth, but cannot bite?

What do you get if you add 2 to 100 four times?

What has 13 hearts but no other organs?

Can you find the thief by just looking at the picture below?