Shakuntla Devi was given this title after she demonstrated the calculation of two 13 digit numbers: 7,686,369,774,870 × 2,465,099,745,779 which were picked at random. She answered correctly within 28 seconds.

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Nisha Tanwar · Accepted Answer

Shakuntla Devi was given this title after she demonstrated the calculation of two 13 digit numbers: 7,686,369,774,870 × 2,465,099,745,779 which were picked at random. She answered correctly within 28 seconds.

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