Survo puzzles: www.survo.fi/puzzles --------------------------------------- Copyright (c) Survo Systems 2006-2012 The easiest way to solve these three problems may be using a Java Applet http://www.survo.fi/swap/puzzles.html based on the swapping method. Survo puzzle 297/2012 (17500) #453-76398 A B C D E 1 * * * * * 48 2 * * * * * 42 3 * * * * * 64 4 * * * * * 56 12 74 24 45 55 Survo puzzle 298/2012 (8200) #453-70218 A B C D E 1 * * * * * 47 2 * * * * * 39 3 * * 7 * * 57 4 * * * * * 67 15 46 21 72 56 Survo puzzle 299/2012 (8100) #453-17108 A B C D E 1 * * * * * 63 2 * * * * * 22 3 * * * 16 * 54 4 * * * * * 71 41 34 57 63 15