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Squares from squares

Your task is to place a digit in each of these 16 squares (right).

When you have finished, the grid should have the following properties:

• no digit occurs more than once in any row
• the sum of the four digits in each row is the same
• the sum of the four digits in each column is the same
• each row should form a different four-figure perfect square

Please send in the four perfect squares, in increasing order.

WIN £15 will be awarded to the sender of the first correct answer opened on Wednesday 12 August. The Editor’s decision is final. Please send entries to Enigma 1553, New ÐÓ°ÉÔ­´´, Lacon House, 84 Theobald’s Road, London WC1X 8NS, or to enigma@newscientist.com (please include your postal address).

Answer to 1547 Square dates: (a) 22.6.2016 (b) 16.03.2016

The winner Jonathan Wright of Wellington, New Zealand