document.write( "Question 250418: What is the common difference in this sequence? \r
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\n" ); document.write( "\n" ); document.write( "5
\n" ); document.write( "21
\n" ); document.write( "37
\n" ); document.write( "17
\n" ); document.write( "21
\n" ); document.write( "29
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Algebra.Com's Answer #182513 by Edwin McCravy(20056) $\"\"$ $\"About$

You can put this solution on YOUR website!
What is the common difference in this sequence? \r
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\n" ); document.write( "\n" ); document.write( "5
\n" ); document.write( "21
\n" ); document.write( "37
\n" ); document.write( "17
\n" ); document.write( "21
\n" ); document.write( "29
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document.write( "There is no common difference in them.  They have to be\r\n" );
document.write( "spaced evenly apart to have a common difference.\r\n" );
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document.write( "21-5 = 16\r\n" );
document.write( "37-21 = 16\r\n" );
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document.write( "So the sequence of the first three only\r\n" );
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document.write( "5 \r\n" );
document.write( "21\r\n" );
document.write( "37 \r\n" );
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document.write( "have a common difference of 16.\r\n" );
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document.write( "But the next number would have to be 53 so that\r\n" );
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document.write( "53-37 = 16\r\n" );
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document.write( "But it isn't.\r\n" );
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document.write( "I don't know why your teacher would expect you to find\r\n" );
document.write( "a common difference when there is none.\r\n" );
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document.write( "Edwin

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