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Question : Directions: Select the number that can replace the question mark (?) in the following series.
105, 107, 103, ?, 101, 111

Option 1: 102

Option 2: 97

Option 3: 113

Option 4: 109


Team Careers360 13th Jan, 2024
Answer (1)
Team Careers360 20th Jan, 2024

Correct Answer: 109


Solution : Given:
105, 107, 103, ?, 101, 111

Add and subtract consecutive even numbers alternately starting from 2 –
105 + 2 = 107; 107 – 4 = 103; 103 + 6 = 109; 109 – 8 = 101; 101 + 10 = 111

So, 109 is the missing number of the series. Hence, the fourth option is correct.

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