General Knowledge

Explanation: The 'Diamond Sutra' is the world's oldest known dated printed book (868 AD).

Explanation: Kimberley in South Africa is famous for its diamond mines.

Explanation: North and South Yemen were united in 1990.

Explanation: Croydon was a former international airport of the UK.

Explanation: Pico Island is part of the Azores, belonging to Portugal.

Explanation: The Aryans first settled in the Punjab region of the Indian subcontinent.

Explanation: Wall's ice cream brand is owned by the UK-based Unilever.

Explanation: Cornetto ice cream is an Italian brand (Algida/Unilever).

Explanation: Hawaii was the 50th and last state to join the United States, in 1959.

Explanation: The Amazon is the world's second-longest river (and largest by volume).