document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=745006>Question 745006</A>: <I><SPAN STYLE=\"word-break: break-all;\"> How do i solve 49 times 19... Mentally?  </SPAN>\n" );
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document.write( "There are many ways for this one.<BR>\n" );
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document.write( "= 19*7 then *7<BR>\n" );
document.write( "= 19*50 then -19 the best for this one, imo<BR>\n" );
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document.write( "Another method, not so attractive for this one is<BR>\n" );
document.write( "Get the average = (49 + 19)/2 = 34<BR>\n" );
document.write( "Diff between ave and numbers = 15<BR>\n" );
document.write( "49*19 = avg^2 - diff^2 = 1156 - 225<BR>\n" );
document.write( "This works well for a lot of them, not so good for this one.<BR>\n" );
document.write( "eg, 37*39 = 1443 easily (if you know what 38^2 is)<BR>\n" );
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