This Number Series and Sequence Practice Test is part of the Civil Service Exam (CSE) Mathematics Reviewer. It contains 25 multiple-choice questions that will test your logical reasoning, pattern recognition, and numerical analysis skills.
Each question presents a sequence of numbers that follow a certain pattern. Your task is to identify the missing number or determine what comes next in the series. The quiz is designed to help you develop your ability to detect mathematical relationships.
After you answer, the correct option will be highlighted in green if correct or red if wrong. Use these results to understand your mistakes and strengthen your analytical thinking.
Click the START QUIZ button below to begin!
Why Practice Number Series and Sequence?
Questions on number patterns are among the most common in the Civil Service Exam’s Analytical or Mathematical Ability sections. They test your ability to think logically, detect trends, and anticipate outcomes. Regular practice of number series helps you:
- Strengthen your analytical and deductive reasoning
- Improve concentration and attention to detail
- Boost your confidence for the actual CSE exam
Remember, the key is observation and logic, not memorization.
What You’ll Learn and Practice
The Number Series and Sequence section measures how well you recognize and continue numerical patterns. These questions require both observation and logical deduction, not just computation.
Common types of series you’ll encounter include:
- Arithmetic Sequence – numbers increase or decrease by a constant difference (e.g., 3, 6, 9, 12, …)
- Geometric Sequence – each number is multiplied or divided by a fixed ratio (e.g., 2, 4, 8, 16, …)
- Square or Cube Series – based on perfect squares or cubes (e.g., 1, 4, 9, 16, 25, …)
- Alternating Series – two or more patterns alternating (e.g., 2, 4, 8, 16, 3, 6, 12, 24, …)
- Mixed Series – combination of arithmetic, geometric, or positional rules
- Fibonacci-Type Series – each number is the sum of the two preceding numbers (e.g., 1, 1, 2, 3, 5, 8, …)
Understanding how these patterns work will allow you to solve even complex sequences more confidently.
How to Approach Number Series Questions
- Observe the pattern carefully. Focus on how each number changes from one to the next.
- Compute the differences. Subtract or divide consecutive numbers to identify the rule.
- Check for alternating patterns. Some series follow two or more alternating rules.
- Watch for exponential or positional relationships. Powers, multiples, and place-based patterns often appear.
- Verify your answer. Apply your discovered rule to confirm it works for the whole sequence.
Tip: Avoid guessing immediately — spend a few seconds analyzing the direction and rate of change in the series.