document.write( "Question 1067054: 7 + 11 + 15 + 19 + ..... + 55 = ? \n" ); document.write( "

Algebra.Com's Answer #682240 by Alan3354(69443) $\"\"$ $\"About$

You can put this solution on YOUR website!
7 + 11 + 15 + 19 + ..... + 55 = ?
\n" ); document.write( "--------
\n" ); document.write( "You could add them.
\n" ); document.write( "---
\n" ); document.write( "1 + (55-7)/4 = 13 elements
\n" ); document.write( "Make 6 pairs 7 to 51:
\n" ); document.write( "7 + 51 = 58
\n" ); document.write( "11 + 47 = 58
\n" ); document.write( "etc.
\n" ); document.write( "--> 6*58 + 55 = 403
\n" ); document.write( "================
\n" ); document.write( "Or,
\n" ); document.write( "6.5 pairs 7 to 55
\n" ); document.write( "7+55 = 62
\n" ); document.write( "11+51 = 62
\n" ); document.write( "6.5*62 = 403
\n" ); document.write( " \n" ); document.write( "

\n" );