This is an excel sheet in which the Suko puzzle can be used interactively or you can print out blank worksheets for pupils to use. Randomly generated to differentiate the puzzles and ideal for KS3 students to practice number operations.
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Unfortunately the opening puzzle is flawed in that there is no unique answer. These are both possible: 7 8 4 1 9 6 5 2 3 and 7 4 8 5 9 6 1 2 3 (I can't check the others since the new version of Office doesn't permit VB macros.)
A superb number puzzle which would be absolutely ideal for a top set as a starter activity. This is a sudoku-ish style puzzle but is very clear to understand and provides a variety of questions, along with answers. Fantastic.
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