The book contains more than 100 different tasks that stimulate active thinking: sudoku puzzles, time calculations, number pyramids, and picture equations. It's time to activate the brain cells! Translated by Ingrīda Kreicberga.
The book contains more than 100 different tasks that stimulate active thinking: sudoku puzzles, time calculations, number pyramids, and picture equations. It's time to activate the brain cells! Translated by Ingrīda Kreicberga.
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