Math Path by Thomas Snyder
or solve online (using our beta test of Penpa-Edit tools; use tab to alternate between a number entry mode, a number candidates mode, and a path drawing mode.)
Theme: Double Vision
Author/Opus: This is the 497th puzzle from Thomas Snyder, aka Dr. Sudoku.
Rules: Write a number from 1 to N (N is given for each puzzle) into each cell so that every number appears in the grid once. There must be a path using just adjacent cells to travel between consecutive numbers from 1 to N. Also, the number in the upper-left corner of each bold cage indicates the value of a mathematical operation (addition, subtraction, multiplication, division) applied successively to all numbers in the cage, starting with the largest number for subtraction and division (e.g. 1,2,4 with subtraction is a 1- clue as 4-2-1 = 1). The operation may or may not be given in the cage, but at least one of the four operations must apply.
See also this example:
Difficulty: 2.5 stars
Time Standards (highlight to view): Grandmaster = 1:45, Master = 4:00, Expert = 8:00
Solution: PDF and solving animation.
Note: Follow this link for other Math Path puzzles and this link for other Number Placement variations.
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