What month of the year has 28 days?

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?

Find a 9-digit number, which you will gradually round off starting with units, then tenth, hundred etc., until you get to the last numeral, which you do not round off. The rounding alternates (up, down, up ...). After rounding off 8 times, the final number is 500000000. The original number is commensurable by 6 and 7, all the numbers from 1 to 9 are used, and after rounding four times the sum of the not-rounded numerals equals 24.

The day before yesterday I was 25 and the next year I will be 28. This is true only one day in a year. What day is my birthday?

You walk into an old horror house. It has no power or plumbing. Once inside, you see three doors. Each door has a number on it. Behind each door is a way for you to die. Behind door number one, you die by getting eaten by a lion. Behind door number two, you die by getting murdered. Behind door number three, you die by an electric chair. You can’t turn back, so you have to go through a door. Which door do you go through?

What is red and smells like blue paint?

How many Watermelons are there in the below picture?

Find the next number in the series.
1 10 24 43 67 ?

A man was just doing his job when his suit was torn. Why did he die three minutes later?

What does Alexander the Great and Winnie the Pooh have in common?