Challenge your brain with these enjoyable puzzles. A jumbo crossword puzzle and general knowledge workout to test and stimulate the brain cells. 50 large grid puzzles from The Sunday Times. These puzzles use a 21 x 21 jumbo-size grid, and appeared in the pages of the Sunday Times, they offer an entertaining and stimulating challenge to all crossword lovers and anyone interested in quizzes, trivia and testing their all-round knowledge. Contains more general knowledge clues then the standard Times Jumbo crossword, for example names of famous people, titles of songs, books, films, plays, operas, musicals and TV shows; places and sights, quotations - questions with one or more words in a quote to identify as the answer.