If the 3 digit number AB9 is a perfect square then is A an odd digit?

One Answer on this Question

1. A perfect square is a square number of a digit. eg 64 is a perfect number, a square of 8
   Now digits AB9 is a square number of a number.
   AB9 Can also be written as A multiply by B multiply by 9
   Get the Square root of AB9
   Assumption, A=1, B=1
   1*1=1=A, 1*1=1=B Therefore,
   Square root of A = A, B = B and 9=3
   Therefore
   An odd number is a number indivisible by 2.
   for example 1,3,5,7…….
   Therefore Squares A*B*9= AB9
   Where a=1, b=1, 3 as digits.
   Conclusion
   A=1 is an odd number

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