Survo puzzles: www.survo.fi/puzzles ----------------------------------- Problems of January 29, 2007 Survo puzzle 36/2007 (25) A B C D E 1 10 17 20 * * 57 2 19 * * 14 * 46 3 * 11 12 * 15 50 4 16 * 18 * 13 57 48 39 51 31 41 Survo puzzle 37/2007 (110) A B C D E F 1 11 * 10 * 6 20 111 2 7 8 * 15 * 26 89 3 16 25 * 27 19 12 127 4 * * 13 22 * * 115 5 * 23 * 24 21 * 134 6 18 * 17 * * 14 90 111 102 103 121 149 80 Survo puzzle 38/2007 (310) A B C D E 1 * * * * * 38 2 * * * * * 27 3 * * * * * 57 4 * * * * * 88 42 21 37 50 60 Hint: The four first numbers in the first row form a four-digit prime number p with the property p mod 101 = 88. The number 5 is not located in that row. The digits can be revealed easily by using Survo. Even without this hint there is a unique solution but then the degree of difficulty would be about 12000. Copyright (c) Survo Systems 2006-2007