74, 79, 86.5, 101.5, 109, 124, 141.5
ATQ, 74 + 5 = 79 79 + 7.5 = 86.5 86.5 + 10 = 96.5 96.5 + 12.5 = 109 109 + 15 = 124 (Double difference of 2.5) Therefore, 96.5 should come in place of 101.5
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