document.write( "Question 979858: WHAT IS NEXT IN THE SERIES 1, 11, 21, 1211, 11121, ______? \n" ); document.write( "
Algebra.Com's Answer #601095 by 428225(90)![]() ![]() You can put this solution on YOUR website! Your series should actually be: \n" ); document.write( " \n" ); document.write( "1, 11, 21, 1211, 111221 , ______? \n" ); document.write( " \n" ); document.write( "To do these types of questions, you look at the amount of times a number appears in each term. \n" ); document.write( " \n" ); document.write( "So for the term \"1\", there is \"one, one\", which numerically written would be \"11\". \n" ); document.write( " \n" ); document.write( "In the term \"11\", there are \"two, ones\", which numerically written would be \"21\". \n" ); document.write( " \n" ); document.write( "In the term \"21\", there is \"one, two\" and \"one, one\", which numerically written would be \"1211\" \n" ); document.write( " \n" ); document.write( "In the term \"1211\", there is \"one, one\", \"one, two\" and \"two, ones\", which numerically written would be \"111221\" \n" ); document.write( " \n" ); document.write( "Now, I will leave you to answer the question yourself.\r \n" ); document.write( "\n" ); document.write( " \n" ); document.write( " |