Question

Find the missing number in the following number series:

78      79       75      84       ?       93       57

A 60 Correct Answer Incorrect Answer
B 68 Correct Answer Incorrect Answer
C 65 Correct Answer Incorrect Answer
D 62 Correct Answer Incorrect Answer
E None of these Correct Answer Incorrect Answer

Solution

The series is: 78 + 12 = 79 79 – 22 = 75 75 + 32 = 84 84 – 42 =  68 68 + 52 = 93 93 – 62 = 57

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