Can you name the US President from the title of their memoir?

Can you name all the British prime minsters of the 20th Century by the years they served?

Can you name all 27 member countries in the European Union?

Can you name all the US President by the years they served?

Can you name the first 10 members of the British Royal Family in the line of succession?

Can you name each cabinet position in the order of presidential succession of the United States?