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Non-fiction - Books and manuals - Challenging Cross Number Puzzles
Challenging Cross Number Puzzles
by Giulio Zambon

ISBN: 978-1-4826-8025-6
Publisher: MatheMagics Asia
Published in: 2013. Pages: 338.
Available in print from the publisher and from Amazon.

One hundred and fifty 10x10 puzzles for those who like to be challenged.

Cross Number is like any normal crossword puzzle. You must solve the clues to be able to write the answers in the grid, like in the example below.