A squared number is a number multiplied by itself. For example, two (2) squared is 2 X 2 = 4; three (3) squared is 3 X 3 = 9. A number squared is shown on a computer as x^2, so 2 squared is 2^2, and 3 squared is 3^2.
twenty three has no square root but it will be in between 4 squared and 5 squared but more towards the 5. also there is + and - square roots such as the two square roots of 9 are +3 and -3. - times - = + and + times + = +.