A 12-year-old boy in Shanxi province does complicated math problems in his head faster than people can use a pocket-calculator. The boy, Shen Kegong. is from a peasant family in Xiaxian county.Last...
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A 12-year-old boy in Shanxi province does complicated math problems in his head faster than people can use a pocket-calculator. The boy, Shen Kegong. is from a peasant family in Xiaxian county.Last...