by Unknown · Libro Hobby Club, S.A. · tapa blanda · ISBN 9788497365482
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«Sudoku + test num 4» is a puzzle book with sudokus and numerical tests, published by Libro Hobby Club, S.A. in paperback, in Spanish.
It brings together sudoku-based puzzles along with numerical tests designed to exercise calculation and mental agility. Its pages combine sudoku grids with challenges such as Juan Carlos's marbles problem, presented with a playful approach aimed at a child and youth audience.
Fourth volume of the «Sudoku + Test Num» series, with a publication date of 26 October 2006.
Suitable for readers from 7 to 100 years old, both children and adults, interested in numerical puzzles and mental calculation.
