88, 73, 77, 62, 66, 51, 55, ?
Explanation:
88 - 15 = 73 73 + 4 = 77 77 - 15 = 62 62 + 4 = 66 66 - 15 = 51 51 + 4 = 55
∴ 55 - 15 = 40
Hence, option (c).
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