21) What color is used to paint the outside of the White House?
22) What is the official residence of the US President?
23) How many levels are there in the White House?
24) Which president added a third floor to the White House?
25) How many stairs lead up to the front entrance of the White House?
26) How many bedrooms are there in the White House?
27) What is the name of the garden on the grounds of the White House?