document.write( "Question 1127290: What's the next number in these four sequences...\r
\n" ); document.write( "\n" ); document.write( "3, -6, 12, 4, 20, ?\r
\n" ); document.write( "\n" ); document.write( "7, 16, 8, 27, 9, ?\r
\n" ); document.write( "\n" ); document.write( "2, 7, 26, 101, 400, ?\r
\n" ); document.write( "\n" ); document.write( "7, 21, 8, 72, 9, ?
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Algebra.Com's Answer #743680 by Alan3354(69443)\"\" \"About 
You can put this solution on YOUR website!
An explanation can be made for any number as the next.
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