Question : Directions: Select the number from among the given options that can replace the question mark (?) in the following series.
84, 90, 91, 99, ?, 108, 105
Option 1: 99
Option 2: 96
Option 3: 95
Option 4: 98
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Correct Answer: 98
Solution :
Given:
84, 90, 91, 99, ?, 108, 105
Add 7 and 9 alternatively to each term to get the next alternate term in the series –
84 + 7 = 91; 90 + 9 = 99; 91 + 7 = 98; 99 + 9 = 108; 98 + 7 = 105
So, 98 is the missing number of the series. Hence, the fourth option is correct.
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