Writing - Non Fiction - Books & Manuals - MatheMagics Asia - MathSquare Puzzles

Do not buy this book.
It contains errors that the publisher refuses to correct. Moreover, the publisher, in breach of our agreement, refuses to pay me any royalty.

One hundred puzzles suitable for all solvers and fifty more difficult puzzles for those who have solved the first one hundred.

The objective of the puzzle is to fill in the grey boxes with the correct numbers and operation. For example, in the following puzzle, a 5 in the top-left position solves the first column and the top row: (5 + 9) x 5 = 14 x 5 = 70 and (5 + 4) / 3 = 9 / 3 = 3. Also, a sum is what is needed as second operation to solve the second row: (9 x 6) + 9 = 54 + 9 = 63.

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