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Greatest Number of Mental Arithmetic (Addition) Problems Solved by a Minor (Male) in 30 Minutes
R.G.Naveen
3-Oct-2015
The Greatest Number of Mental Arithmetic (Addition) Problems Solved by a Minor (Male) in 30 Minutes counted to 1223 perfect answers out of 1270 arithmetic sums, was completed by R.G.Naveen, ARJWIN Abacus, Tiruppur District, Tamil Nadu, India on October 3, 2015.
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