Answer : 3 289 Explanation : Answer: C) 289 Explanation: Here the given number series is 270, 261, 279, 252, 289, 243270 - 9 = 261261 18 = 279279 - 27 = 252252 36 = 288 (not equals to 289)288 - 45 = 243 Hence, the odd number in the given number series is 289.

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