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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, ¿ìè¶ÌÊÓƵ, 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