---
title: "FLT 1 - Number Series (Q39): What will come in place of the question mark (?) in the following series? 57, 73, 105, ?, 217"
canonical_url: "https://testx.in/questions/01a12e6b-9b21-7cb2-acf7-f4dab940ee17/flt-1-number-series-q39-what"
subject: "Quantitative Aptitude"
topic: "Number System"
difficulty: "MEDIUM"
verified: false
cite_as: "TestX — Quantitative Aptitude (Number System): https://testx.in/questions/01a12e6b-9b21-7cb2-acf7-f4dab940ee17/flt-1-number-series-q39-what"
---
# FLT 1 - Number Series (Q39): What will come in place of the question mark (?) in the following series? 57, 73, 105, ?, 217
- **Subject**: Quantitative Aptitude
- **Topic**: Number System
- **Difficulty**: MEDIUM
- **Canonical URL**: https://testx.in/questions/01a12e6b-9b21-7cb2-acf7-f4dab940ee17/flt-1-number-series-q39-what
## Options
- **(A)** 153
- **(B)** 151
- **(C)** 156
- **(D)** 148
- **(E)** 161
## Verified Answer
**Correct Answer**: Option (A): 153
### ⚡ 10-Second Exam Shortcut Trick
⚡ 10-Second Exam Shortcut: Eliminate options ending in incorrect units or calculate unit digits first before solving full arithmetic.
### 📝 Step-by-Step Derivation
1. Analyze the given condition or equation.
2. Apply the standard formula or deduction rules.
3. Correct choice is (A): 153
### ⚠️ Common Trap to Avoid
⚠️ Common Trap: Misreading inverse proportions or rushing calculation in the last algebraic step.

### 💡 Exam Tip
💡 Exam Tip: Always verify if question asks for perimeter, area, or remaining fraction.

## Related Practice Questions
- [If the 4-digit number x67y is exactly divisible by 9, then the least value of (x + y) is_____.](https://testx.in/questions/01a0a833-3a9b-7e93-ae98-10a211a783d9/if-the-4digit-number-x67y-is)
- [Which of the following pairs of non-zero values of p and q make the 6-digit number 674pq0 divisible by both 3 and 11?](https://testx.in/questions/01a0a83a-fb86-7a4f-ae63-f712ca68fb1e/which-of-the-following-pairs-of)
- [The HCF of two numbers 110 and 1980 is:](https://testx.in/questions/01a0a83a-fdad-7872-8ddd-abf8d51cd465/the-hcf-of-two-numbers-110)
- [6^25 + 6^26 + 6^27 + 6^28 is divisible by:](https://testx.in/questions/01a0a842-bf44-702b-affe-a54d753ce91f/625-626-627-628-is-divisible)

---
Practice full mock tests in [SSC CGL Complete Test Series 2026](https://testx.in/test-series/ssc-cgl-complete-test-series-2026) or browse [TestX](https://testx.in).