12-01-2003, 10:24 PM
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here and there
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Join Date: Jan 2002
Location: Western NY
Posts: 3,601
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Quote:
Originally posted by jennaflower
damn..
now I KNOW there has to be a logical reason for this...
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OK... here goes...
x=the first three digits
y=the last four digits
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Take the first three digits of your telephone number
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x 80x 80x+1
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Now multiply your answer by 250
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250(80x+1) = 20,000x+250
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Next add the last four digits of your telephone number to your answer.
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20,000x+250+y
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Add the last four digits one more time.
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20,000x+250+y+y = 20,000x+250+2y 20,000x+250+2y-250 = 20,000x+2y (20,0000x +2y)/2 = 10,000x+y
hence, (any 3 digit number * 10,000) + (any four digit number) = the original X and Y in order (forming the telephone number)
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