Chapter III Test 5 — Life in the UK Test Practice
About Chapter III Test 5 (Official 3rd Edition Handbook)
Chapter III Test 5 is a free 24-question practice test for British citizenship naturalisation and Indefinite Leave to Remain (ILR / settlement) applicants in the United Kingdom. Every question is written directly from the official Home Office handbook, Life in the UK: A Guide for New Residents (3rd Edition), covering British values, UK history, society, and government. To pass the official Life in the UK Test (booking fee £50 at gov.uk), candidates must answer at least 18 out of 24 multiple-choice questions correctly (75% pass mark) within 45 minutes.
Life in the UK Chapter III Test 5

Which of the following is NOT a British invention of the 20th century?
Correct Answer: Radioactivity
Radioactivity is not a British invention — it was discovered by the French physicist Henri Becquerel in 1896 and further researched by Marie Curie (Polish-French).
The radar, the Turing machine, and the World Wide Web are all genuine British inventions of the 20th century, developed by Sir Robert Watson-Watt, Alan Turing, and Sir Tim Berners-Lee respectively.