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Why Twitter makes twice the cash Facebook does on mobile devices

By WTOP Staff

Ken Colburn with Data Doctors

Hail to the chief: Take our presidential trivia quiz

By Rick Massimo
EDITOR'S NOTE: WTOP first brought you this quiz in 2019. Presidents Day is coming. How well do you know the less-important facts about the nation's leaders? Take WTOP's quiz — with any luck, it won't take you all Presidents Day to finish it.
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