Social Insurance NumberDate: 7/3/96 at 11:40:52 From: Anonymous Subject: Social Insurance Number Make a valid Social Insurance Number that has 8 as its check digit. Date: 7/3/96 at 23:13:36 From: Doctor Mike Subject: Re: Social Insurance Number Hello, Revenue Canada's Internet Service publishes the SIN formula in http://www.rc.gc.ca/E/pub/tg/t4028ed/t4028ed.html as follows: ====== Information for Magnetic Media Filers 1995 - Computer Specifications for Data Filed on Magnetic Media - Invalid or missing social insurance numbers cause processing delays. Included below is the formula we use to validate this number. Example Employee's social insurance number (SIN): 550 911 895 Formula: Assigned Digits Digits Check digit Recipient's SIN (Exclude the check digit, position 9, from calculation) 5 5 0 9 1 1 8 9 5 == 5 9 1 9 Multiply every second digit by 2 x2 x2 x2 x2 -- -- -- -- 10 18 2 18 Cross add the resulting digits (1 + 0 + 1 + 8 + 2 + 1 + 8) = 21 Cross add the intervening digits (5 + 0 + 1 + 8) = 14 -- Total 35 Subtract from the next highest number ending in zero 40 -- Check digit (i.e., 40 - 35 = 5) 5 ====== Following this example, 550 911 598 would satisfy the question. There are many others. Perhaps yours? I hope this helps. -Doctor Mike, The Math Forum Check out our web site! http://mathforum.org/dr.math/ |
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