+------+------+------+------+ | | | | | +---- -+------+------+------+ | | | | | +------+------+------+------+ | | | | | +------+------+------+------+ | | | | | +------+------+------+------+
When she had finished, the grid had the following properties:
• No digit occured more than once in any row.
• The sum of the four digits in each row was the same.
• The sum of the four digits in each column was the same.
• Each row formed a different four-digit perfect square.
Complete the 4x4 square grid given above.
Note: Adapted from Enigma #1553 which appeared in 'New Scientist' in 2009.
re(4): Solution
