What comes next: 1, 3, 7, 15, 31,?
Show answer & explanation
Correct answer: D
Explanation
1, 3, 7, 15, 31, ?
1 × 2 + 1 = 3
3 × 2 + 1 = 7
7 × 2 + 1 = 15
15 × 2 + 1 = 31
Hence,
31 × 2 + 1 = 63
Correct answer: D) 63
SSC Selection Post 2025 PYQ — Question 90
SSC Selection Post - Matriculation Level - 30th July 2025 - Shift 1 • Reasoning • Q90