N 52° 22.XAC W 001° 59.(Y+C-B)(D-B)A
In 830 the numerate mathematician AAMibnMal-K wrote The Compendious Book on Calculation by Completion and Balancing (al-Kitab al-mukhtasar fi hisab al-jabr wa'l-muqabala) in which he introduced algebra (al-jabr) and this 2 by 2 square. To solve it, place an Arabic numeral in each of the 4 squares so that:
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the 4 rows/columns (reading left to right/top to bottom) each contain a perfect square number, except for one, which contains the prime number that appears 7th in the room for squares. If help is needed, seek the hidden message of Malachi, Obadiah, Ruth, Samuel (especially) and Ezra on the ancient page.
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C is bigger than B
Then solve for X and Y.
There is nothing at the listed co-ordinates. This cache contains a square needed to find 3 by 3.
Links to other caches in the series:
¤ The Numbers Square
¤ 7 by 7
¤ 6 by 6
¤ 5 by 5
¤ 4 by 4
¤ 3 by 3
¤ 2 by 2 (too!)
¤ Bonus - 1 by 1
¤ Bonus - 26 by 26
Part of The Final Revelation series of 66 puzzle caches.