document.write( "Question 771507: which number comes next
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Algebra.Com's Answer #470277 by ramkikk66(644)\"\" \"About 
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document.write( "which number comes next\r\n" );
document.write( "15,18,54,57,171\r\n" );
document.write( "Ans:\r\n" );
document.write( "Next number is 174, followed by 522\r\n" );
document.write( "The series is built by doing successive operations of\r\n" );
document.write( "a) add 3\r\n" );
document.write( "b) multiply by 3\r\n" );
document.write( "starting from the 1st number.\r\n" );
document.write( "Hope you got it :)\r\n" );
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