Each blank square should contain a single digit number from Every set of numbers across or down has a sum total equal to that of its clue, shown either directly above or directly to the left, as per the example below Number Sequencing Puzzle. Cut out and glue the number tiles in the correct order The Puzzle: There are infinitely many formulas that will fit any finite series. Each blank square should contain a single digit number from Every set of numbers across or down sequence of whole numbers