Question

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

105       226       82       251       ?       280

A 48 Correct Answer Incorrect Answer
B 51 Correct Answer Incorrect Answer
C 45 Correct Answer Incorrect Answer
D 55 Correct Answer Incorrect Answer
E None of these Correct Answer Incorrect Answer

Solution

105 + 112 = 226 226 – 122 = 82 82 + 132 = 251 251 – 142 = 55 55 + 152 = 280

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