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Lin mark this message contains true information
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3月14日國際數學節，也是圓周率（π）日。

References

http://www.epochtimes.com/b5/15/3/14/n4387636.htm
國際數學節

美國數學迷慶祝百年一遇的「圓周率日」 - 大紀元

更新: 2015-03-14 10:56 PM    標籤: 圓周率 【大紀元2015年03月14日訊】（大紀元記者馬麗綜合報導）今天（3月14日）是甚麼節日？很多人可能不知道，今天是國際數學節，也是圓周率（π）日，中國人稱圓周率為「派」（Pi Day）。 圓周率在許多數學領域都有非常重要的作用。1761年德國數學家蘭伯特證明了圓周率是無理數，小數點後可一

http://www.epochtimes.com/b5/15/3/14/n4387636.htm
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IDATA

難怪有人會如此醉心於數學，請看有趣的算式。
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

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
請把這些有趣的結果轉發給你的朋友。國際數學節快樂！

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