document.write( "Question 845949: Next number in sequence
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\n" ); document.write( "\n" ); document.write( "7, 21, 8, 72, 9 \n" ); document.write( "
Algebra.Com's Answer #511703 by AnlytcPhil(1806)\"\" \"About 
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document.write( "3, -6 , 12, 4, 20 \r\n" );
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document.write( "Start with 3\r\n" );
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document.write( " 3 -  9 = -6\r\n" );
document.write( "-6 + 18 = 12\r\n" );
document.write( "12 -  8 =  4\r\n" );
document.write( " 4 + 16 = 20\r\n" );
document.write( "20 -  7 = 13\r\n" );
document.write( "13 + 14 = 27\r\n" );
document.write( "27 -  6 = 21\r\n" );
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document.write( "7, 16, 8, 27, 9 \r\n" );
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document.write( "7\r\n" );
document.write( "2×8 = 16\r\n" );
document.write( "8\r\n" );
document.write( "3×9 = 27\r\n" );
document.write( "9\r\n" );
document.write( "4×10 = 40\r\n" );
document.write( "10\r\n" );
document.write( "5×11 = 55\r\n" );
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document.write( "7, 26, 101, 400\r\n" );
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document.write( "Start with 7\r\n" );
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document.write( "  7×4-2 =   28-2 =  26\r\n" );
document.write( " 26×4-3 =  104-3 = 101\r\n" );
document.write( "101×4-4 =  404-4 = 400\r\n" );
document.write( "400×4-5 = 1600-5 = 1595 \r\n" );
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document.write( "7, 21, 8, 72, 9\r\n" );
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document.write( "Start with 7\r\n" );
document.write( " 7\r\n" );
document.write( " 7×31 =   7×3 =  21\r\n" );
document.write( " 8 \r\n" );
document.write( " 8×32 =   8×9 =  72\r\n" );
document.write( " 9\r\n" );
document.write( " 9×33 =  9×27 = 243\r\n" );
document.write( "10\r\n" );
document.write( "10×34 = 10×81 = 810\r\n" );
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document.write( "Edwin
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