- Oct 7, 2000
 
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The first problem: Given the expression: 
+1+2+3+4+5+6+7+8+9+10
Either find a way to change some of the plus signs to minus signs in order to make the entire expression equal zero, or prove that there is no way to do it.
			
			+1+2+3+4+5+6+7+8+9+10
Either find a way to change some of the plus signs to minus signs in order to make the entire expression equal zero, or prove that there is no way to do it.
				
		
			