mindblowingfactz:Shakuntala Devi, an Indian mental calculator,…

mindblowingfactz:

Shakuntala Devi, an Indian mental calculator, was asked to give the 23rd root of a 201-digit number; she answered in 50 seconds. On 18 June 1980, she demonstrated the multiplication of two 13-digit numbers 7,686,369,774,870 x 2,465,099,745,779. She correctly answered 18,947,668,177,995,426,462,773,730 in 28 seconds. –Source

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