joined at birth). The format of the book was step by step: it started with (x-y)(x+y)=x2 - y2. You proved that and then came a slightly harder theorem of the same kind, in which the proof uses the first theorem, and so on one result building on another up to the state of the art as it was when the book was published (1880s). The book was intended to prepare or "cram" Cambridge students for the math exam known as the Tripos.

Ramanujan became not just familiar with the math in this book, it became his environment.

A recent author has suggested that math ability derives from the brain abilities used in social understanding. Think of living in a tribe or small town where "everybody knows everybody". By growing upMOTOGP - TESTS IN QATAR - DAY 2

APRILIA IS FIFTH ON THE SECOND DAY OF MOTOGP TESTS IN QATAR

ALEIX ESPARGARÒ RIDES HIS 2017 RS-GP CLOSER AND CLOSER TO THE LEADERS

SAM LOWES ALSO CONTINUES TO IMPROVE CONSISTENTLY

Aprilia was the nicest surprise on the second day of tests in Qatar, the last ones before the Grand Prix Motorcycle Racing championship opening round, also scheduled to be held in Qatar on 26 March.

Confirming the good sensations he had yesterday when, slowed by a crash, he had shown the potential to move up in the standings, Aleix Espargarò rode his 2017 Aprilia RS-GP to fifth place in the rankings for the day with a time of 1’55.121, just 66 one hundredths behind the leader, Viñales. This is the best result yet that