Question

What should come in place of the question mark (?) in the following number series?

230192 172 ? 122 100

A 129 Correct Answer Incorrect Answer
B 115 Correct Answer Incorrect Answer
C 126 Correct Answer Incorrect Answer
D 142 Correct Answer Incorrect Answer
E None of these Correct Answer Incorrect Answer

Solution

(15)2 + 5 = 230 (14)2 - 4 = 192 (13)2 + 3 = 172 (12)2 - 2 = 142 (11)2 + 1 = 122 (10)2 - 0 = 100

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