document.write( "Question 623612: pls help us find the next number in the series..
\n" ); document.write( "3,15,35,63,99,?
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Algebra.Com's Answer #392186 by Alan3354(69443)\"\" \"About 
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pls help us find the next number in the series..
\n" ); document.write( "3,15,35,63,99,?
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\n" ); document.write( "find the difference between adjacent numbers.
\n" ); document.write( "then find the difference between those numbers.
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