---
title: "Chapter Test: Number Series (Q1): Find the next term in the arithmetic sequence: 10, 15, 20, ?"
canonical_url: "https://testx.in/questions/01a12e6b-d7f3-702d-9aab-eb5bc6adafaf/chapter-test-number-series-q1-find"
subject: "Quantitative Aptitude"
topic: "Number System"
difficulty: "EASY"
verified: false
cite_as: "TestX — Quantitative Aptitude (Number System): https://testx.in/questions/01a12e6b-d7f3-702d-9aab-eb5bc6adafaf/chapter-test-number-series-q1-find"
---
# Chapter Test: Number Series (Q1): Find the next term in the arithmetic sequence: 10, 15, 20, ?
- **Subject**: Quantitative Aptitude
- **Topic**: Number System
- **Difficulty**: EASY
- **Canonical URL**: https://testx.in/questions/01a12e6b-d7f3-702d-9aab-eb5bc6adafaf/chapter-test-number-series-q1-find
## Options
- **(A)** 25
- **(B)** 27
- **(C)** 22
- **(D)** 30
- **(E)** 24
## Verified Answer
**Correct Answer**: Option (A): 25
### ⚡ 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): 25
### ⚠️ 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.

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