+1438 Find the unique four-digit integer n with these properties:
The last digit (the units digit) of n is 9.
The digits of n add up to 27.
Two digits of n are the same.
n is a perfect square.
+118609 If x^2 ends in 9 then the x must end in 3 or 7
If x^2 is four digits then x must be between 32 and 99
So the only possibilities for x are
33, 37, 43, 47, 53, 57, 63, 67, 73, 77, 83, 87, 93, 97
Square each of those and find the one/s that fit the other two requirements :)
