A square patio was tiled with square tiles all the same size. Some
of the tiles were removed from the middle of the patio in order to
make a square flower bed, but the number of the remaining tiles was
still a square number. What were the dimensions of the patio and
the flower bed?
How many four digit square numbers are composed of even numerals?
What four digit square numbers can be reversed and become the
square of another number?
What is the value of the digit A in the sum below: [3(230 + A)]^2 =