Q1
Not Answered
NATIVE
Q1. Find the next number: 10, 18, 26, 34, 42, ?
Arithmetic progression with common difference 8. Next = 50.
Home / General Aptitude / Number Series
General Aptitude
Number Series
Sharpen pattern recognition with arithmetic, geometric, and mixed number series questions.
About Number Series
Number series questions test your ability to identify patterns and predict the next term in a sequence. These are common in logical reasoning sections of placement and competitive exams. The patterns can be arithmetic (+2, +5, -3), geometric (×2, ÷3), or more complex involving alternating operations, squares, cubes, or combinations. A systematic approach — checking differences between consecutive terms, then ratios, then higher-order patterns — is the most reliable method. Below are solved number series questions with explanations to sharpen your pattern recognition skills.
Key Takeaways
- Always check differences first — they reveal the underlying pattern.
- If differences don't help, check ratios between consecutive terms.
- Look for alternating patterns, square/cube sequences, or combined rules.
- Practice is key: the more patterns you see, the faster you recognize them.
Frequently Asked Questions
How do I solve number series questions?
First check the difference between consecutive terms. If differences form a pattern (constant, increasing, or themselves a series), that reveals the rule. If not, check ratios. If neither works, look for alternating patterns, squares, cubes, or combination rules.
What are common number series patterns?
Arithmetic (+/- constant), Geometric (×/÷ constant), Square/Cube patterns, Fibonacci-like (sum of previous two), Alternating (two interleaved series), and Mixed (combination of arithmetic and geometric).
Ready to practice?
You will get a fresh set each session. Select an option to instantly see correctness and explanation.
20 questions
~6 minutes
Randomized each time
Explanations included
Answered
0%
Session
0%
Q2
Not Answered
NATIVE
Q2. Find the next number: 11, 32, 16, 26, 15, 33, ?
Odd positions follow +2 sequence. Next odd-position term is 17.
Q3
Not Answered
NATIVE
Q3. Find the next number: 8, 15, 22, 29, 36, ?
Arithmetic progression with common difference 7. Next = 43.
Q4
Not Answered
NATIVE
Q4. Find the next number: 5, 27, 8, 28, 15, 34, ?
Odd positions follow +2 sequence. Next odd-position term is 17.
Q5
Not Answered
NATIVE
Q5. Find the next number: 8, 10, 12, 14, 16, ?
Arithmetic progression with common difference 2. Next = 18.
Q6
Not Answered
NATIVE
Q6. Find the next number: 11, 25, 16, 30, 19, 28, ?
Odd positions follow +2 sequence. Next odd-position term is 21.
Q7
Not Answered
NATIVE
Q7. Find the next number in the pattern: 3, 6, 12, 24, 48, ?
Geometric progression with ratio 2. Next = 48 x 2 = 96.
Q8
Not Answered
NATIVE
Q8. Find the next number: 10, 32, 17, 25, 17, 38, ?
Odd positions follow +2 sequence. Next odd-position term is 19.
Q9
Not Answered
NATIVE
Q9. Find the next number in the pattern: 3, 9, 27, 81, 243, ?
Geometric progression with ratio 3. Next = 243 x 3 = 729.
Q10
Not Answered
NATIVE
Q10. Find the next number: 12, 19, 26, 33, 40, ?
Arithmetic progression with common difference 7. Next = 47.
Q11
Not Answered
NATIVE
Q11. Find the next number: 14, 27, 15, 31, 13, 30, ?
Odd positions follow +2 sequence. Next odd-position term is 15.
Q12
Not Answered
NATIVE
Q12. Find the next number in the pattern: 5, 10, 20, 40, 80, ?
Geometric progression with ratio 2. Next = 80 x 2 = 160.
Q13
Not Answered
NATIVE
Q13. Find the next number: 12, 21, 13, 34, 10, 27, ?
Odd positions follow +2 sequence. Next odd-position term is 12.
Q14
Not Answered
NATIVE
Q14. Find the next number in the pattern: 5, 15, 45, 135, 405, ?
Geometric progression with ratio 3. Next = 405 x 3 = 1215.
Q15
Not Answered
NATIVE
Q15. Find the next number: 15, 20, 10, 27, 9, 35, ?
Odd positions follow +2 sequence. Next odd-position term is 11.
Q16
Not Answered
NATIVE
Q16. Find the next number in the pattern: 2, 6, 18, 54, 162, ?
Geometric progression with ratio 3. Next = 162 x 3 = 486.
Q17
Not Answered
NATIVE
Q17. Find the next number: 6, 32, 13, 26, 18, 29, ?
Odd positions follow +2 sequence. Next odd-position term is 20.
Q18
Not Answered
NATIVE
Q18. Find the next number in the pattern: 2, 4, 8, 16, 32, ?
Geometric progression with ratio 2. Next = 32 x 2 = 64.
Q19
Not Answered
NATIVE
Q19. Find the next number: 13, 22, 8, 25, 10, 38, ?
Odd positions follow +2 sequence. Next odd-position term is 12.
Q20
Not Answered
NATIVE
Q20. Find the next number in the pattern: 4, 12, 36, 108, 324, ?
Geometric progression with ratio 3. Next = 324 x 3 = 972.
Quiz Summary
Score: 0 / 20
Accuracy: 0%
Attempted: 0 | Skipped: 20
Time: 00:00
Number Series Formula, shortcuts & preparation guide
Master number series with regular practice. Key topics include percentage calculations, profit/loss, ratio, and time-work problems. Use shortcut methods for quick calculations and practice 15-20 questions daily to build speed and accuracy. This topic frequently appears in placement aptitude rounds.
Key formulas
- Regular practice improves accuracy
Number Series Practice Questions with Answers
Build speed and accuracy with curated number series practice. Each quiz includes solved explanations, timed mode, and instant correctness feedback.
How to prepare effectively for this topic?
Practice short timed sets daily, review every explanation, and track recurring mistakes for weekly revision.
Are these questions useful for placements and competitive exams?
Yes. The format mirrors common screening rounds with option-based answers and explanation-driven learning.