The historic Knightsbridge hotel, which celebrates its 125th anniversary in 2012, has 65 rooms, a restaurant serving British cuisine and the Drawing Room where guests can enjoy afternoon tea.
Event space includes two inter-connecting private rooms, which have natural daylight, original stained glass windows, and a total capacity for 70 for a reception.
The hotel counts Oscar Wilde and actress Lillie Langtry among its former guests.
The prize includes a two-night stay at The Cadogan for in a double or twin Deluxe Room with breakfast, and afternoon tea for two.
To enter, please send your answer to the following question to firstname.lastname@example.org by 17 February: How many bedrooms does the hotel have?
Terms and conditions
The prize includes a two-night stay at The Cadogan for two guests sharing a double or twin Deluxe Room with full English breakfast, and afternoon tea for two on one day.
It is valid from 31 January until 30 November 2012, and is subject to availability. There is no cash alternative. Travel and all extras are not included in the prize. The prize winner must be over 18 years of age.