yeah its good..
try in a calculator
123+321+789+987=2220
147+741+369+963=2220
159+951+753+357=2220
456+654+852+258=2220
125+521+523+325+785+587+985+589=4440
745+547+145+541+563+365+569+965=4440
458+854+856+658+452+254+652+256=4440
2007-12-18 02:55:54
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answer #2
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answered by mayavan 2
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Interestingly, if you take the convolution of the list {1,1,1,1,1,1,1,1,1} with itself, you get {1,2,3,4,5,6,7,8,9,8,7,6,5,4,3,2,1}, which is equivalent to multiplying 111111111 by 111111111 and getting 12345678987654321.
This works with the convolution of any two lists of 1s with fewer than 10 items. For example, the convolution of {1,1,1} and {1,1,1,1} is {1,2,3,3,2,1}, just as 111 * 1111 = 123321.
This only works with lists composed of 1s, which are assumed to be padded in both directions with an infinite number of zeroes.
2007-12-18 03:00:09
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answer #3
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answered by lithiumdeuteride 7
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111,111,111 x 111,111,111
=12345678987654321
2007-12-18 02:46:42
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answer #4
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answered by An ESL Learner 7
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