Fastest Mental Addition Of Ten-Digit Numbers

Fastest Mental Addition Of Ten-Digit Numbers

7 year-old maths prodigy Cherlyn Lee improved her own timing by more than one minute to become the fastest person to complete 10 sums without a mistake. Each sum has 10 numbers and each number has 10 digits. She calculated them mentally and broke her own record at the CMA competition at Republic Polytechnic on 29 May 2011. She completed the sums, totalling a thousand digits, in 3 min 59 sec.

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