Call it a study in probability. Fifteen-year-old Tajik schoolgirl Yosuman Ismonzoda says she stumbled on her ticket to international notoriety "completely by chance" when she took her younger brother ...

Now as an adult in the banking industry, Ms Devendranath, 32, can still smash through 80 sums in just one minute – and is encouraging kids all over Australia to embrace maths and follow in her ...