Q 01/05

What was the codename for intelligence produced at Bletchley Park?

A) Venona

B) Magic

C) Ultra

D) Purple

Answer · why

C) Ultra

Ultra: Bletchley's codebreaking stayed hidden until the mid-1970s, when former codebreakers began writing about it.

Q 02/05

Which section of Bletchley Park, responsible for German naval cryptanalysis, did Turing lead?

A) Hut 6

B) Hut 8

C) Hut 3

D) Hut 11

Answer · why

B) Hut 8

Hut 8: Turing took on naval Enigma, he said, 'because no one else was doing anything about it and I could have it to myself'.

Q 03/05

Turing's bombe was a far more powerful version of a codebreaking machine first built in which country?

A) France

B) Poland

C) Czechoslovakia

D) The Netherlands

Answer · why

B) Poland

Poland: its mathematicians were reading Enigma before the war, and in July 1939 they shared their methods with Britain and France.

Q 04/05

Which mathematician's enhancement made the bombe a primary Bletchley tool against Enigma?

A) Dilly Knox

B) Gordon Welchman

C) Hugh Alexander

D) Max Newman

Answer · why

B) Gordon Welchman

Gordon Welchman: his diagonal board exploited Enigma's plugboard swapping letters in pairs, so if B became G, then G became B.

Q 05/05

Like every recruit to Bletchley Park, which act did Turing have to sign on arrival?

A) The Treachery Act

B) The Official Secrets Act

C) The Emergency Powers Act

D) The Defence of the Realm Act

Answer · why

B) The Official Secrets Act

The Official Secrets Act: because so much of his work stayed covered by it, Turing was never fully recognised during his lifetime.