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Algebra Difficulty 2.0 Junior Prove it United Kingdom

Both rows of the following grid have the same sum. What is the value of $*$ ? Row 1: $1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 1050$ . Row 2: $11, 12, 13, 14, 15, 16, 17, 18, 19, 20, *$ .

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