Quantitative Aptitude – Number Series Basics (Easy Patterns & Tricks)
Number series questions are based on finding patterns in numbers. You need to identify the rule and find the missing number.
Basic Idea
Numbers follow a pattern like addition, subtraction, multiplication, or combination.
Type 1: Addition Pattern
Example:
2, 4, 6, 8, ?
Pattern: +2
Answer: 10 ✔
Type 2: Multiplication Pattern
Example:
2, 4, 8, 16, ?
Pattern: ×2
Answer: 32 ✔
Type 3: Square Pattern
Example:
1, 4, 9, 16, ?
Pattern: 1², 2², 3², 4²
Answer: 25 ✔
Type 4: Mixed Pattern
Example:
2, 6, 7, 21, 22, ?
Pattern: ×3, +1
Answer: 66 ✔
How to Solve
- Check difference between numbers
- Check multiplication/division
- Look for square/cube pattern
Practice Questions
Q1: 3, 6, 9, 12, ?
Q2: 5, 10, 20, 40, ?
Q3: 1, 8, 27, 64, ?
Answers
Q1: 15
Q2: 80
Q3: 125
Quick Tricks
- Check simple pattern first
- Do not overthink
- Practice regularly
Final Tip
Number series becomes easy with practice. Focus on patterns and solve quickly.
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