document.write( "Question 825036: in this series 6,4,1,2,2,8,7,4,2,1,5,3,8,6,2,2,1,4,1,3,5,8,6,how many pairs of successive numbers have a difference of 2 each ?
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Algebra.Com's Answer #496974 by Edwin McCravy(20056)\"\" \"About 
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Underline them:\r\n" );
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document.write( "6,4,1,2,2,8,7,4,2,1,5,3,8,6,2,2,1,4,1,3,5,8,6\r\n" );
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document.write( "Answer: There are five. (6,4), (4,2), (5,3), (8,6) and (8,6)  \r\n" );
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document.write( "Note: We did not underline (1,3) or (3,5) because their \r\n" );
document.write( "difference is 1-3 = 3-5 = -2, not 2.\r\n" );
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document.write( "To find the difference between two numbers, it's always \r\n" );
document.write( "\"first minus second\", never \"second minus first\".\r\n" );
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document.write( "Edwin
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