Find the missing term in the series: -1, 2, 7, ?, 23, 34
2026
Find the missing term in the series:
-1, 2, 7, ?, 23, 34
- A.
16
- B.
15
- C.
14
- D.
18
Attempted by 13 students.
Show answer & explanation
Correct answer: C
The series follows a pattern where consecutive odd numbers are added to each term, starting with 3. Specifically, -1 plus 3 equals 2, and 2 plus 5 equals 7. Continuing this sequence by adding 7 results in the missing term being 14, which is confirmed because 14 plus 9 equals 23 and 23 plus 11 equals 34.