FACTOID # 102: Kids in Mali spend only 2 years in school. More than half of them start working between the ages of 10 and 14.
 
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Encyclopedia > Yoriyuki Arima

Yoriyuki Arima (November 25, 1714 - November 23, 1783) was a Japanese mathematician of the Edo era. He was the lord of Kurume domain and approximated the value of pi and the square of pi.

 

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