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Are you Derrick Niederman, author of the books below?
Number Freak by Derrick Niederman The Puzzler's Dilemma by Derrick Niederman What the Numbers Say by Derrick Niederman A Killing on Wall Street by Derrick Niederman The Little Giant Book of Math Puzzles by Derrick Niederman Hard-to-Solve Math Puzzles by Derrick Niederman Mind-stretching Math Puzzles by Derrick Niederman Sit & Solve Brainteasers by Derrick Niederman The Remarkable Lives of Numbers by Derrick Niederman Mensa Math by Derrick Niederman


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