Dattaraya Ramchandra Kaprekar (17 January 1905 in Dahanu, Maharashtra - 1986) was an Indian mathematician who discovered many interesting properties in number theory. Having never received any formal postgraduate training, for his entire career (1930-1962) he was a schoolteacher at Nashik in Maharashtra, India. Yet he became well known in recreational mathematics circles, and has a number, a constant, and a Magic square named after him . Kaprekar received his secondary school education in Thane and studied at Fergusson College in Pune. In 1927 he won the Wrangler R. P. Paranjpe Mathematical Prize for an original piece of work in mathematics. He attended the University of Mumbai, receiving his bachelor\s degree in 1929. He published extensively, writing about such topics as recurring decimals, magic squares, and integers with special properties. In particular, the Kaprekar
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