What goes up but never comes down?

In The 1st month of this year(the year 2013), I noticed that the date 13-1-13 (13 January 2013) is special.

This date is special as:

Date * Month = Year.

Can you figure out which year of this century has a maximum number of such dates?

A man in a car saw a Golden Door, Silver Door and a Bronze Door. What door did he open first?

Can you make four (4) nines (9) equal 100?

Can you name any English verb that becomes its past tense by simply rearranging the alphabets ?

A man embarked on a questionnaire game. He kept asking the same question to whomever he found. The answer each time was different.

Can you guess what the question was?

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

What Is It?

I am working in a bus company. The company recently went under expansion and therefore there was not enough room for all the buses. As a result, twelve buses had to be stored outside.

If the company decides to expand the garage space by forty percent, enough space to accommodate the current buses will be created leaving enough space for twelve more buses if the need arises in future.

Can you calculate the number of buses that the company owns at present?

Mr Red Lives in the red house.
Mr Green Lives in the greenhouse.
Mr Yellow Lives in the yellow house.

Who lives in the Whitehouse?

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