Sunday Times Teaser 3138 – Primus Inter Impares
by Edmund Marshall
Published Sunday November 13 2022 (link)
Just nine Prime Ministers held office in the Kingdom of Primea during the 20th century. No two Prime Ministers held office at the same time, none had more than one period in office, and the gap between successive Prime Ministers’ terms was never more than a month. Each held office for a period of time in which the number of whole years was a different prime number (eg holding office from 1910 to 1915 could cover four or five whole years) and no Prime Minister served for more than 30 years. Appropriately, they all took office in prime years, but there was no change of Prime Minister in 1973.
In which years during the 20th century did new Prime Ministers in Primea take up office?