1 x 1 = 1
11 x 11 = 121
111 x 111 = 12321
1111 x 1111 = 1234321
11111 x 11111 = 123454321
111111 x 111111 = 12345654321
1111111 x 1111111 = 1234567654321
11111111 x 11111111 = 123456787654321
111111111 x 111111111 = 12345678987654321
So squaring a number that is all 1’s gives a numerical palindrome. Why?
Well there is a nice simple visual answer
More on such patterns here.
1 comment:
Binary?
Laby[mans suit]
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