Franklin's magic squares. 18th Century document by Benjamin Franklin, describing the method for making 'magical squares'. A magic square is an arrangement of numbers in a square grid, where the numbers in each row and each column, and the numbers in the main and secondary diagonals, all add up to the same number.
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Creative#:
TOP16629923
Source:
達志影像
Authorization Type:
RM
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須由TPG 完整授權
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