3 x 37 = 111
6 x 37 = 222
9 x 37 = 333
12 x 37 = 444
15 x 37 = 555
18 x 37 = 666
21 x 37 = 777
24 x 37 = 888
27 x 37 = 999
Nice one:
111,111,111 x 111,111,111 =
12,345,678,987,654,321
Trapeze:
0x 9 + 1 = 1
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
another Trapeze:
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
and another one:
0x 9 + 8 = 8
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
987654321 x 9 - 1 = 8888888888
9876543210 x 9 - 2 = 88888888888
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算不在多，有順則行。題不在深，有答則靈。斯在教室，惟吾不行。慢到上桌綠，眼色入發青。旁邊有天才，往來無可能。於是備小抄，數星星。無聊天之亂耳，有算錯之情形。南有計算機，西有電話亭。學子云：何錯之有？
(亂改by翔未)
(原文)
山不在高，有仙則名。水不在深，有龍則靈。斯是陋室，惟吾德馨。苔痕上階綠，草色入簾青。談笑有鴻儒，往來無白丁。可以調素琴，閱金經。無絲竹之亂耳，無案牘之勞形。南陽諸葛廬，西蜀子雲亭。孔子云：何陋之有？
(算式參考網路)
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