Extremely Hard General Knowledge #42

Which former Portuguese Prime Minister became the Secretary-General of the United Nations in 2017?

Which UK football team has the nickname 'Monkey Hangers'?

In which year was the Grand National declared void due to the majority of the runners carrying on after a false start?

Which Alexandrian mathematician wrote the Arithmetica mathematics text and is often referred to as 'the father of algebra'?

What is the name of the RAF air officer who is credited with inventing the turbojet in the 1930s?

What is the capital of Italian region of Calabria, the region which occupies the "toe" of Italy's "boot"?

Which battle in the First English Civil War was fought in Yorkshire on the 2nd of July 1644?

Which Russian novelist's works included 'Queen of Spades', 'The Captain's Daughter' and 'Eugene Onegin'?

Excluding the 3 Crown Dependencies, how many postcode areas are in the United Kingdom?

Which president of Iran from 1981-1989 before he became the 2nd Supreme Leader of Iran?

What was the name of the man that Princess Eugenie married in 2018?

What is the international unit for radioactivity, represented by the symbol Bq?

Which American singer starred alongside Laurence Olivier in The Wedding Singer (1980)?

Which olive-coloured gem is the birthstone for August?

Which band have had 4 UK Christmas Number Ones including "I Feel Fine", "Day Tripper/We Can Work It Out" and "Hello, Goodbye" in 1964, 1965 and 1967 respectively?

Which city in Denmark is the second largest by population and home to the headquarters of Arla Foods?

"Hurricane" by Bob Dylan is about the imprisonment of which boxer?

In 1979, Jon Voight won the Best Actor Oscar and Jane Fonda won the Best Actress Oscar for which film?

In Greek Mythology, who did Perseus set free from Cetus before marrying her?

Which British cookery writer wrote booklets such as Is There a Nutmeg in the House? and An Omelette and a Glass of Wine ?