A 21-year-old Indian student, Rajveer Meena, set a Guinness World Record as he memorised Pi’s 70,000 post-decimal digits and recalled them blindfolded in 9 hours and 27 minutes. Meena broke a 10-year record which was set by a Chinese, who had recalled 67,890 post-decimal digits of Pi in 2005 in 24 hours and 7 minutes.