Ploblem solving. Chalk sketch of two puzzles with words impure and pure
Schlüsselwörter
chalk,
advice,
pure,
solving,
vignetting,
drawing,
blackboard,
question,
solution,
study,
balance,
problem,
university,
concept,
brainstorm,
college,
board,
decision,
impure,
learn,
research,
answer,
search,
puzzle
Deutsch
