doing sudokus with a blue pen

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Photo credit: © Arnau Ramos Oviedo / Alamy / Afripics
License: Royalty Free
Model Released: No

Keywords: analylze, blank, brainteaser, close, closeup, comp, competition, concept, crossword, decipher, enigma, entertainment, frustration, fun, game, grid, hobby, holding, incomplete, japanese, leisure, logic, math, mathematics, maze, newspaper, number, numbers, open, paper, patience, pencil, play, problem, puzzl