Question : Directions: Which of the following numbers will replace the question mark (?) in the given series?
75, 76, 78, 79, 81, 82, 84, 85, 87, ?
Option 1: 96
Option 2: 88
Option 3: 90
Option 4: 80
Correct Answer: 88
Solution :
Given:
75, 76, 78, 79, 81, 82, 84, 85, 87, ?
In the above-given series, add 1 and 2 alternately to the numbers of the given series.
75 + 1 = 76; 76 + 2 = 78; 78 + 1 = 79; 79 + 2 = 81; 81 + 1 = 82; 82 + 2 = 84; 84 + 1 = 85; 85 + 2 = 87; 87 + 1 = 88
So, the missing number is 88. Hence, the second option is correct.
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