<![CDATA[Add a nine to the end of the number]]>1) Adding a nine***/*****
22 = 4. Writing a 9 after it, I get 49 which is 72
42 = 16. Writing a 9 after it, I get 169 which is 132
What is the next square number, which, when adding a 9 after the number, is a square?

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