1975 AHSME Problems/Problem 6
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The sum of the first eighty positive odd integers subtracted from the sum of the first eighty positive even integers is
Solution
Solution by e_power_pi_times_i
When the 
th odd positive integer is subtracted from the th even positive integer, the result is 
. Therefore the sum of the first eighty positive odd integers subtracted from the sum of the first eighty positive even integers is 
.
