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The identification number d 1 d 2 d 10 on an American Express Traveler's Check satisfies ( d 1 + d 2 +... + d

The identification number d1d2 d10 on an American Express Traveler's Check satisfies (d1 + d2 +... + d10) mod 9 = 0. Determine the check digit # on the check number 536178450#.

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