conundrum
black
blackboard
board
brain
brain teaser
brainteaser
chalk
chalkboard
challenge
cognitive
concept
contour
design
doodle
draw
drawing
exercise
find
game
hand drawn
icon
illustration
ingenuity
intelligence
isolated
japanese
knowledge
line
linear
logic
math
mathematical
memory
mental
number
place
placement
problem
puzzle
riddle
sketch
solution
solving
sudoku
symbol
test
web
white
定額
Sudoku puzzle chalk icon. Number-placement game. Mental exercise. Ingenuity, knowledge, intelligence test. Brain teaser. Problem solving. Solution finding. Isolated vector chalkboard illustrationの素材 [FY310135543886]
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