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| Shankuntala Devi |
Shakuntala Devi —Human Computer, is a calculating prodigy, Her calculating gifts first demonstrated themselves while she was doing card tricks with her father when she was three.They report she "beat" them by memorization of cards rather than by sleight of hand. By age six she demonstrated her calculation and memorization abilities at the University of Mysore.n when she was eight, she had success at Annamalai University by doing the same.
In Dallas she competed with a computer to see who give the cube root of 188138517 faster, she won.
In 1977 At university of USA she was asked to give mentally the 23rd root of 91674867692003915809866092758538016248310668014430862240712651642793465704086709659 32792057674808067900227830163549248523803357453169351119035965775473400756818688305 620821016129132845564895780158806771 (201-digit number).
She answered in 50seconds. The answer is 546372891, She did this 12 seconds faster than the Univac-1108.
On June 18, 1980 she demonstrated the multiplication of two 13-digit numbers 7,686,369,774,870 x 2,465,099,745,779 picked at random by the Computer Department of Imperial College, London. She answered the question in 28 seconds this time is more likely the time for dictating the answer (a 26-digit number) than the time for the mental calculation.Her correct answer was 18,947,668,177,995,426,462,773,730. This event is mentioned in Guinness Book of Records 1995.
Shakuntala Devi has authored a few books. She shares some of the methods of mental calculations in her books.
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| Puzzles to Puzzle You |
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| Figuring: The Joy of Numbers |
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| Mathability: Awaken the Math Genius in Your Child |
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| Mathability: Awaken the Math Genius in Your Child |
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| In the Wonderland of Numbers |
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| Super Memory: It Can Be Yours |
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| More Puzzles to Puzzle You |
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| Figuring: The Joy of Numbers |
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| Book of Numbers |
Her other books include
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| Astrology for You |
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| The World of Homosexuals |
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