document.write( "Question 1122538: Mark is 16 years old. In 4 years he will be twice Norma’s age. How old is Norma now? \n" ); document.write( "

Algebra.Com's Answer #738678 by ikleyn(52781) $\"\"$ $\"About$

You can put this solution on YOUR website!
.
\n" ); document.write( "

\r\n" );
document.write( "If Mark is 16 years now, he will be 20 years old in 4 years.\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "Since Mark will be 20 years old in 4 years, Norma will be 10 years old at that time.\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "Hence, Norma is 10-4 = 6 years old now.\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "Answer.  Norma is 6 years old now.\r\n" );
document.write( "

\r
\n" ); document.write( "\n" ); document.write( "It is a 2-nd grade problem, which can be solved (and, I believe, MUST be solved) without using any equations.\r
\n" ); document.write( "
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "===============\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "This my note goes specially to Alan:\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "

\r\n" );
document.write( "    There is NO an ambiguity in the given formulation.\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "    As formulated, it ALWAYS means \"the age then\".\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "    If the opposite is not pointed directly and explicitly.\r\n" );
document.write( "

\r
\n" ); document.write( "\n" ); document.write( " \n" ); document.write( "

\n" );