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> Beauty of Maths!> > 1 x 8 + 1 = 9> 12 x 8 + 2 = 98> 123 x 8 + 3 = 987> 1234 x 8 + 4 = 9876 > 12345 x 8 + 5 = 98765 > 123456 x 8 + 6 = 987654> 1234567 x 8 + 7 = 9876543> 12345678 x 8 + 8 = 98765432> 123456789 x 8 + 9 = 987654321> > 1 x 9 + 2 = 11> 12 x 9 + 3 = 111 > 123 x 9 + 4 = 1111 > 1234 x 9 + 5 = 11111> 12345 x 9 + 6 = 111111> 123456 x 9 + 7 = 1111111> 1234567 x 9 + 8 = 11111111> 12345678 x 9 + 9 = 111111111> 123456789 x 9 +10= 1111111111 > > 9 x 9 + 7 = 88 > 98 x 9 + 6 = 888> 987 x 9 + 5 = 8888> 9876 x 9 + 4 = 88888> 98765 x 9 + 3 = 888888> 987654 x 9 + 2 = 8888888> 9876543 x 9 + 1 = 88888888> 98765432 x 9 + 0 = 888888888 > > Brilliant, isn't it?> > And finally, take a look at this symmetry:> > 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
posted by M. Taheri | 13:14
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