FACTOID # 126: Iceland has many, many more tractors per 1000 hectares of cropland than any other nation - more than twice that of the next highest country, Slovenia.
 
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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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