Instructions: In the following number series only one number is wrong. Find out the wrong number.
9050, 5675, 3478, 2147, 1418, 1077, 950
9070 - 153 = 5675 , 5675 - 133 = 3478 , 3478 - 113 = 2147 , 2147 - 93 = 1418 , 1418 - 73 = 1075 ≠ 1077 , 1075 - 53 = 950
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