The Times Su Doku: The Times Killer Su Doku Book 20: 200 Lethal Su Doku PuzzlesChallenge yourself with number puzzles The latest volume in the hugely popular Killer Su Doku series from The Times, featuring the highest quality puzzles with an extra element of arithmetic. These puzzles will test your skills to the limit, adding the challenge of arithmetic and taking Su Doku to a new and even deadlier level of difficulty. The puzzles use the same 9x9 grid as Su Doku but with an added mathematical challenge. The aim is not only to
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The Times Su Doku: The Times Killer Su Doku Book 20: 200 Lethal Su Doku Puzzles