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Question

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

10 11 12 20 24 ?

A 51 Correct Answer Incorrect Answer
B 41 Correct Answer Incorrect Answer
C 61 Correct Answer Incorrect Answer
D 71 Correct Answer Incorrect Answer
E None of these Correct Answer Incorrect Answer

Solution

10 + 13 =11 11 +12 =12 12 +23 =20 20 +22 =24 24 + 33 = 51

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