Select the number that can replace the question mark (?) in the following series.
105, 107, 103, ?, 101, 111
Show answer & explanation
Correct answer: D
Explanation
The correct answer is option 4 i.e 109.
| Understanding |
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The pattern is +2, - 4, + 6, - 8, +10 so, 105, 107, 103, 109, 101, 111 is correct series. Hence the correct answer is 109. |