document.write( "Question 1107244: a 2 digit number gives a remainder of 6 when divided by 10. it gives a remainder of 5 when divided by 7. find the greatest possible 2 digit number \n" ); document.write( "
Algebra.Com's Answer #722256 by ikleyn(52811)![]() ![]() You can put this solution on YOUR website! . \n" ); document.write( "96.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( " \r\n" ); document.write( " Obviously, this 2-digit number is of the form N =x6, where x is the \"tens\" digit and 6 is the \"ones\" digit.\r\n" ); document.write( "\r\n" ); document.write( "\r\n" ); document.write( " Since \"it gives a remainder of 5 when divided by 7\", it means that N-5 is divisible by 7.\r\n" ); document.write( "\r\n" ); document.write( "\r\n" ); document.write( " N-5 is the number of the form x1 (referring to N = x6), i.e. N-5 is ended by \"1\".\r\n" ); document.write( "\r\n" ); document.write( "\r\n" ); document.write( " Among 2-digit numbers there are only TWO of the form x1 that are divisible by &. They are 21 and 91.\r\n" ); document.write( "\r\n" ); document.write( "\r\n" ); document.write( " 91 is the largest, and it produces N = 96.\r\n" ); document.write( "\r \n" ); document.write( "\n" ); document.write( "Solved.\r \n" ); document.write( " \n" ); document.write( " \n" ); document.write( "\n" ); document.write( " \n" ); document.write( " |