46. According to the 2014-2015 Australian Bureau of Statistics, what percentage of Australians were born overseas?
47. The Fields Medal, one of the most sought after awards in mathematics, is awarded every how many years?
48. What is the Italian word for "tomato"?
49. According to Sherlock Holmes, "If you eliminate the impossible, whatever remains, however improbable, must be the..."
50. What is the shape of the toy invented by Hungarian professor Ernő Rubik?