Ключевые слова: answer, artwork, brain, brainteaser, challenge, clue, concept, confusion, cryptic, curiosity, design, discovery, enigma, graphic, icon, image, incomplete, intellect, investigation, jigsaw, knowledge, logic, mind, missing, mystery, piece, problem, problemsolving, puzzle, question, question mark, questioner, search, solution, symbol, thinking, uncertainty, unknown, visual,