Originally Posted by nightcracker
Prove it!
10c
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I am certainly not a mathematician so I am not sure how one would go about proving it without listing every square number and I think that might upset the site admins. due to the length the post would require.
However, this might be enough ----------
As this example shows, numbers below 961 have decreasing digits, while those above it have increasing digits * ..., * 784, * 841, * 900, * 961, * 1024, * 1089, * 1156, * ...