viernes, 17 de octubre de 2014

The four fours

Srinivasa Ramanujan was an Indian mathematician from the 20th century. He was called “ the friend of numbers.” He had a natural ability with numbers and was very famous in the scientific world for that reason. When he was a child, he invented a game to entertain his brothers while they were waiting at Madras train station.
There was a train with four coaches and a steam engine in front of them. Every coach had the number four on it and the steam engine had the number one.






Can you work out all the necessary mathematical operations with the four fours in order to get all the following numbers until 9?

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