Staff Selection Commission General Intelligence & Reasoning — Question 86
Question
Which number replaces ? in: 3, 7, 15, 31, ?
- 47
- 55
- 63
- 71
Correct answer
C — 63
Explanation (English)
Each term = previous x 2 + 1. 31x2+1=63
More General Intelligence & Reasoning questions
- Coding Decoding — If ROAD is coded as URDG, how is SWAN coded?
- Odd One Out — Find the odd one out: Apple, Mango, Potato, Grapes
- Number Series — If 2+3=10, 7+2=63, 6+5=66, then 8+4=?
- Number Series — Complete the series: 2, 6, 12, 20, 30, ?
- Logical Reasoning — A is taller than B. C is taller than A. D is taller than C. Who is the shortest?
- Coding Decoding — If CAT = 24 and DOG = 26, then COW = ?
Practice 1000+ more questions like this
TestPod AI has hand-curated previous-year-questions for SSC, RRB NTPC, IBPS PO, SBI Clerk, and more — with AI explanations in Tanglish, Hinglish, and English.