88 Piano Keys
9 Planets inthe Solar system
4 Presidents on mount Rushmore
200 Pounds for passing go in Monopoly
64 squares on a chessboard
90 degrees in a right angle
Well yes if you must be pedantic about it ..The IAU has changed the definition of "planet" so that Pluto no longer qualifies..but it's only a quiz ! And the site where most quiz setters get their Ditloids from still gives it as nine . http://www.creativepuzzels.nl/spel/speel1/spee l2/oplos45-2.htm