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2009 AIME I Question 8

AIME · 2009 AIME I

Question 8

Let $S = \{2^0, 2^1, 2^2, \ldots, 2^{10}\}.$ Consider all possible positive differences of pairs of elements of $S.$ Let $N$ be the sum of all of these differences. Find the remainder when $N$ is divided by $1000.$