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Two-Digit Prime Numbers Sudoku (1098)
Instruction:
Apply classic sudoku rules. A line between two neighbouring digits represents a two-digit prime number. All possible horizontal (from left to right) and vertical (from top to bottom) two-digit prime numbers are given.
For your convenience, prime numbers that can be used in this puzzle are: 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53, 59, 61, 67, 71, 73, 79, 83, 89 and 97.