document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1133719>Question 1133719</A>: <I><SPAN STYLE=\"word-break: break-all;\"> In a two digit number, the unit digit is 3 greater than the ten's digit. Find the number. If it is 4 times a large as the sum of it digit. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #750971 by </B><A HREF=/tutors/aboutme.mpl?userid=greenestamps><B>greenestamps(13216)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=greenestamps><IMG SRC=http://www.algebra.com/images/aboutme-small.gif BORDER=0 alt=\"About Me\" VALIGN=MIDDLE></A>&nbsp;<IMG SRC=http://www.algebra.com/cgi-bin/show-face.mpl?user=greenestamps><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=750971\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> <br><BR>\n" );
document.write( "Solving the problem using formal algebra is a good exercise....<br><BR>\n" );
document.write( "But if an algebraic solution is not required, solving the problem by logical reasoning is also good brain exercise... and gets you to the answer MUCH faster.<br><BR>\n" );
document.write( "The units digit is 3 more than the tens digit.  That means the possible 2-digit numbers are 14, 25, 36, 47, 58, and 69.<br><BR>\n" );
document.write( "The number is 4 times the sum of its digits.  Only one of those possible 2-digit numbers is a multiple of 4.  So...<br><BR>\n" );
document.write( "ANSWER (in about 10-15 seconds): 36 </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );