Answer : 4 437 Explanation : Answer: D) 437 Explanation: The series follow the rule, 21 = 77 = 92-4165 = 132-4285 = 172-45,9,13,17,21,( 4)...In the same way next no. will be 212-4 = 441 - 4 = 437

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What is the next number of the following sequence ?21, 77, 165, 285, ......

Answer : 4 437 Explanation : Answer: D) 437 Explanation: The series follow the rule, 21 = 77 = 92-4165 = 132-4285 = 172-45,9,13,17,21,( 4)...In the same way next no. will be 212-4 = 441 - 4 = 437

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