document.write( "Question 1205570: A typical Social Security number is 555-47-5593. How many Social Security numbers are possible if the first three digits cannot be 1? \n" ); document.write( "

Algebra.Com's Answer #842466 by ikleyn(52781) $\"\"$ $\"About$

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\n" ); document.write( "A typical Social Security number is 555-47-5593. How many Social Security numbers are possible
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document.write( "If all nine-digit Security numbers be allowed from  000-00-0000  till  999-99-9999,\r\n" );
document.write( "the amount of such numbers would be  1,000,000,000 (one billion).\r\n" );
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document.write( "But, according to the problem,  Security numbers from  111-00-0000  to  111-99-9999 are prohibited.\r\n" );
document.write( "The amount of the prohibited numbers is  1,000,000  (one million).\r\n" );
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document.write( "So, the  ANSWER  to the problem's question is this difference\r\n" );
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document.write( "         1,000,000,000 - 1,000,000 = 999,000,000.\r\n" );
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