Question

06.
x & y are 2 different digits. If the sum of the two digit numbers formed by using both the digits is a perfect
square, then value of x+y is​

Answer 1

If X, Y are the digits then XY + YX is a perfect square. => (10X + Y) + (10Y + X) = 11(X + Y)is a perfect square. It is possible only if X + Y = 11