Hand holding a red pen solving a sudoku Japanese number puzzle

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Size: 6000px × 4000px
Photo credit: © Ellen Isaacs / Alamy / Afripics
License: Royalty Free
Model Released: No

Keywords: addiction, addictive, brainteaser, brainteasers, challenge, challenging, demanding, difficult, digits, fun, game, games, grid, hand, hard, hobby, ink, japanese, number, numbers, paper, pen, puzzle, puzzles, recreation, red, scene, smart, solution, solve, solving, sudoku, sudokus, write, writing