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Tamanna
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Registered: 2011-12-11
 

Let us learn to mathematics-20

1^2 = 1
2^2 = 4 = 1+2+1
3^2 = 9 = 1+2+3+2+1
4^2 = 16 = 1+2+3+4+3+2+1
5^2 = 25 = 1+2+3+4+5+4+3+2+1
6^2 = 36 = 1+2+3+4+5+6+5+4+3+2+1
7^2 = 49 = 1+2+3+4+5+6+7+6+5+4+3+2+1
8^2 = 64 = 1+2+3+4+5+6+7+8+7+6+5+4+3+2+1
9^2 = 81 = 1+2+3+4+5+6+7+8+9+8+7+6+5+4+3+2+1
10^2 = 100 = 1+2+3+4+5+6+7+8+9+10+9+8+7+6+5+4+3+2+1

1089 X 9 = 9801
10989 X 9 = 98901
109989 X 9 = 989901
1099989 X 9 = 9899901
10999989 X 9 = 98999901
109999989 X 9 = 989999901
1099999989 X 9 = 9899999901