document.write( "Question 1070098: How to find the sum of even numbers from 2 to 80? \n" ); document.write( "
Algebra.Com's Answer #685200 by Alan3354(69443)\"\" \"About 
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How to find the sum of even numbers from 2 to 80?
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\n" ); document.write( "2 to 80 --> 40 even numbers.
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\n" ); document.write( "Use pairs:
\n" ); document.write( "2 + 80 = 82
\n" ); document.write( "4 + 78 = 82
\n" ); document.write( "6 + 76 = 82
\n" ); document.write( "etc for 20 pairs
\n" ); document.write( "20*82 = 1640
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