Chaz Barnes is able to do large math problems in his head, quickly. He can multiply any two numbers from 1-1000 in his head. wls EVERGREEN PARK, Ill. (WLS) -- For a lot of people, doing math means ...
Seven-year-old Mary can multiply large numbers in her head. She can spot errors in complex equations on a college blackboard. “He forgot the negative sign on the exponent,” she says. “But I didn’t ...
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