document.write( "Question 900318: The number which best completes the sequence below is:
\n" ); document.write( "2 9 5 13 10 19 17
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Algebra.Com's Answer #545968 by JulietG(1812)\"\" \"About 
You can put this solution on YOUR website!
27
Maybe....

\n" ); document.write( "2 +7 = 9
\n" ); document.write( "9 -4 = 5
\n" ); document.write( "5 +8 = 13
\n" ); document.write( "13 -3 = 10
\n" ); document.write( "10 +9 = 19
\n" ); document.write( "19 -2 = 17
\n" ); document.write( "17 +10 = 27
\n" ); document.write( "27 -1 = 26
\n" ); document.write( "26 +11 =37
\n" ); document.write( "37 -0 = 37
Positives go up, negatives go down. Every other pair. I couldn't find a better pattern given these numbers.
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