[스크랩] 재밌는 숫자배열

아래 표시하기 클릭                                                                                             고구마꽃 Beauty of Mathematics!    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 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

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