Properties of Square

1. A square cannot end with odd no of zeros.
2.A square cannot end with 2,3,7 or 8.
3.The square of an odd no is odd.
4. The square of an even no is even.
5. Every square is a multiple of 3 or exceeds the multiple of 3 by 1.
6.Every square no is a multiple of 4 or exceeds a multiple of 4 by 1.
7.If a square no ends in 9,the preceeding digit is even.