What Have We Discussed?

1.If a natural number m can be expressed as n2, where n is also a natural number, then m is a number.

2.All square numbers end with 0, 1, 4, 5, 6 or 9 at unitstenshundreds place.

3.Square numbers can only have evenodd number of zeros at the end.

4.Square root is the inversedirect operation of square.

5.There are two integral square roots of a perfect square number. Positive square root of a number is denoted by the symbol ·

For example, 32 = 9 gives 9 =