Question : Directions: Select the option that will replace the question mark (?) in the following number series.
11, 15, 12, 16,13, ?
Option 1: 31
Option 2: 17
Option 3: 21
Option 4: 19
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Correct Answer: 17
Solution :
Given:
11, 15, 12, 16, 13, ?
Add 4 and subtract 3 from each alternative number, to get the required missing number in the series –
11 + 4 = 15, 15 – 3 = 12, 12 + 4 = 16, 16 – 3 = 13, 13 + 4 = 17
So, the required missing term in the series is 17. Hence, the second option is correct.
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