Which number will come next in the given number series? 1, 3, 7, 15, 31, ____
2026
Which number will come next in the given number series?
1, 3, 7, 15, 31, ____
- A.
92
- B.
115
- C.
63
- D.
131
Attempted by 1440 students.
Show answer & explanation
Correct answer: C
Answer: 63
Justification:
Pattern: each term = previous × 2 + 1 (equivalently, add 2, 4, 8, 16, ...).
Calculations: 1 × 2 + 1 = 3; 3 × 2 + 1 = 7; 7 × 2 + 1 = 15; 15 × 2 + 1 = 31.
Next term: 31 × 2 + 1 = 63.
Missing number = 63.