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Number Series Questions for NICL AO help candidates improve their calculation speed, number patterns, and problem-solving skills for the Quantitative Aptitude section. These questions ask you to find a missing number or identify a number that does not follow the given pattern. Common patterns include addition, subtraction, multiplication, squares, cubes, and prime numbers. Regular practice can help you solve these questions faster and avoid careless mistakes. In this blog, you will find exam-level practice questions, answers with simple explanations, preparation tips, and useful resources for your NICL AO exam preparation.

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Number Series Questions for NICL AO: Practice Quiz

Here are 10 practice questions based on common number series patterns. The set includes missing-number and wrong-number questions to help you practise different methods. Try solving each question before checking the answers and explanations below. Practising Number Series Questions for NICL AO can help you improve your calculation speed, identify number patterns, and score better in the Quantitative Aptitude section.

Part 1: Missing Number Series (Q1 – Q5)

Directions (Q1–Q5): Find the missing number in the following given series.

Q1. Find the Missing Number: 4, 11, 30, 67, 128, ?

Solution:
The pattern follows (n³ + 3), where n increases from 1 onwards.
• 1³ + 3 = 4
• 2³ + 3 = 11
• 3³ + 3 = 30
• 4³ + 3 = 67
• 5³ + 3 = 128
• 6³ + 3 = 216 + 3 = 219
Therefore, the missing number is 219.

Q2. Find the Missing Number: 12, 13, 28, 87, 352, ?

Solution:
Multiply each number by consecutive natural numbers and add the same number.
• 12 × 1 + 1 = 13
• 13 × 2 + 2 = 28
• 28 × 3 + 3 = 87
• 87 × 4 + 4 = 352
• 352 × 5 + 5 = 1,765
Therefore, the missing number is 1,765.

Q3. Find the Missing Number: 7, 8, 18, 57, ?, 1,165

Solution:
The series follows the pattern of multiplying by consecutive natural numbers and adding the same number.
• 7 × 1 + 1 = 8
• 8 × 2 + 2 = 18
• 18 × 3 + 3 = 57
• 57 × 4 + 4 = 232
• 232 × 5 + 5 = 1,165
Therefore, the missing number is 232.

Q4. Find the Missing Number: 10, 14, 23, 39, 64, ?

Solution:
Find the difference between consecutive numbers:
• 14 − 10 = 4 = 2²
• 23 − 14 = 9 = 3²
• 39 − 23 = 16 = 4²
• 64 − 39 = 25 = 5²
The next difference should be 6² = 36.
Therefore, 64 + 36 = 100.
The missing number is 100.

Q5. Find the Missing Number: 50, 49, 47, 44, 40, ?

Solution:
The series decreases by consecutive natural numbers:
• 50 − 1 = 49
• 49 − 2 = 47
• 47 − 3 = 44
• 44 − 4 = 40
• 40 − 5 = 35
Therefore, the missing number is 35.

Part 2: Wrong Number Series (Q6 – Q10)

Directions (Q6–Q10): Identify the wrong number in the given series.

Q6. Identify the Wrong Number: 3, 5, 13, 43, 176, 891

Solution:
The series follows the pattern of multiplying by consecutive natural numbers and adding increasing numbers:
• 3 × 1 + 2 = 5
• 5 × 2 + 3 = 13
• 13 × 3 + 4 = 43
• 43 × 4 + 5 = 177
• 177 × 5 + 6 = 891
The fourth operation should produce 177, not 176. Therefore, 176 is the wrong number.

Q7. Identify the Wrong Number: 6, 7, 16, 41, 90, 154, 292

Solution:
The series follows the pattern of adding squares of consecutive odd numbers:
• 6 + 1² = 7
• 7 + 3² = 16
• 16 + 5² = 41
• 41 + 7² = 90
• 90 + 9² = 171
• 171 + 11² = 292
The number 154 should be 171. Therefore, 154 is the wrong number.

Q8. Identify the Wrong Number: 5, 11, 23, 47, 96, 191

Solution:
The series follows the pattern of multiplying each number by 2 and adding 1:
• 5 × 2 + 1 = 11
• 11 × 2 + 1 = 23
• 23 × 2 + 1 = 47
• 47 × 2 + 1 = 95
• 95 × 2 + 1 = 191
The number 96 should be 95 to maintain the pattern. Therefore, 96 is the wrong number.

Q9. Identify the Wrong Number: 8, 18, 40, 86, 178, 370

Solution:
Multiply each number by 2 and add consecutive even numbers:
• 8 × 2 + 2 = 18
• 18 × 2 + 4 = 40
• 40 × 2 + 6 = 86
• 86 × 2 + 8 = 180
• 180 × 2 + 10 = 370
The number 178 should be 180. Therefore, 178 is the wrong number.

Q10. Identify the Wrong Number: 123, 128, 135, 146, 160, 176

Solution:
The series increases by consecutive prime numbers: 5, 7, 11, 13, and 17.
• 123 + 5 = 128
• 128 + 7 = 135
• 135 + 11 = 146
• 146 + 13 = 159
• 159 + 17 = 176
The number 160 should be 159. Therefore, 160 is the wrong number.

Quiz Summary

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Final Score: 0.00

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Number Series Questions for NICL AO 2026: Understanding the Exam Trend

Number series is an important topic in Quantitative Aptitude. In these Number Series Questions for NICL AO, you get a list of numbers arranged according to a hidden rule. Your task is to find that rule and choose the correct answer.

For the NICL AO exam, practise these common types of number patterns:

Missing Number Series: Find the number that completes the given sequence.
Wrong Number Series: Identify the number that breaks the pattern.
Difference-Based Series: Check the gaps between consecutive numbers.
Multiplication-Based Series: Look for multiplication followed by addition or subtraction.
Square and Cube Series: Identify patterns involving perfect squares and cubes.
Prime Number Series: Check whether the differences follow prime numbers.
Mixed Number Series: Look for a combination of two or more rules.

Tip: Do not start calculating randomly. First, check the difference between consecutive numbers. If the gaps do not follow a clear rule, try multiplication, division, squares, cubes, or a combination of operations.

For the complete list of exam topics, read the NICL AO Syllabus and Exam Pattern.

Basic Rules to Solve NICL AO Number Series Questions

Before attempting the quiz, understand these simple rules. They can help you find the pattern without wasting too much time. A pattern should explain the entire series, not just two or three numbers.

Pattern	What to Check	Example
Addition	Numbers increase by a fixed amount	5, 10, 15, 20
Subtraction	Numbers decrease by a fixed amount	30, 25, 20, 15
Multiplication	Each number is multiplied by the same value	2, 4, 8, 16
Squares	Numbers follow square values	1, 4, 9, 16, 25
Cubes	Numbers follow cube values	1, 8, 27, 64, 125
Increasing differences	The gap changes in a pattern	2, 5, 9, 14, 20
Mixed operations	Multiplication or addition rules change step by step	3, 7, 17, 51

Quick Method to Find the Pattern

Step 1: Find the difference between each pair of numbers.
Step 2: Check whether the differences increase or decrease regularly.
Step 3: If the gaps do not help, check multiplication and division.
Step 4: Look for squares, cubes, or prime numbers.
Step 5: Apply the rule to the remaining numbers to confirm your answer.

Tips to Solve Number Series Questions for NICL AO

Regular practice of Number Series Questions for NICL AO can help you recognise patterns faster and approach Quantitative Aptitude questions with greater confidence. Consistent practice also improves calculation speed, accuracy, and time management during the exam.

Check the differences: Subtract consecutive terms to find a pattern.
Look for multiplication: Check whether the numbers are multiplied or divided by consecutive integers.
Identify squares and cubes: Patterns involving squares, cubes, and prime numbers are common in number series questions.
Check the operations carefully: A wrong-number series may contain only one term that breaks an otherwise consistent pattern.
Practise with a timer: Solve questions under time limits to improve speed and accuracy.

How to Practise NICL AO Number Series Questions?

Practising Number Series Questions for NICL AO with a clear plan can help you improve your speed and accuracy. Follow these simple steps to understand number patterns, avoid common mistakes, and prepare more effectively for the Quantitative Aptitude section.

Start with basic patterns: Learn addition, subtraction, multiplication, squares, and cubes.
Move to mixed patterns: Practise questions that use two operations together.
Solve questions with a timer: This helps you learn to manage your time during the exam.
Use a practice PDF: Save questions for revision and solve them again without checking the answers.
Attempt mock tests: Practise number series along with other Quantitative Aptitude topics.
Track your accuracy: Note how many questions you solve correctly and which patterns cause trouble.

Final Thoughts

Regular practice of Number Series Questions for NICL AO can make them easier to solve. Start with simple patterns, learn to recognise number relationships, and gradually practise mixed and challenging questions. Review every mistake and use timed tests to improve your speed and accuracy. Combine number series practice with other Quantitative Aptitude topics to prepare for the NICL AO exam in a balanced way. For more exam preparation resources, visit PracticeMock.

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Number Series Questions for NICL AO FAQs

Q1. What are number series questions in the NICL AO exam?

Number series questions ask you to find a missing number or identify an incorrect number in a sequence. You need to recognise the rule connecting the numbers.

Q2. Which number series patterns should I practise for NICL AO?

Practise addition, subtraction, multiplication, division, square numbers, cube numbers, prime-number differences, and mixed-operation series. Also practise both missing-number and wrong-number questions.

Q3. How can I solve number series questions quickly?

Start by finding the differences between consecutive numbers. If the differences do not show a clear pattern, check multiplication, division, squares, cubes, or mixed operations. Confirm that your rule fits the full series.

Q4. Are number series questions part of NICL AO Quantitative Aptitude?

Number Series is included in the Quantitative Aptitude topics listed in PracticeMock’s NICL AO syllabus guide. Candidates should check the latest notification and syllabus for the current recruitment cycle.

Q5. How can I improve my accuracy in number series questions?

Practise different patterns regularly, avoid guessing, and check your rule against every term. Review incorrect answers to understand where your method went wrong.

Q6. Should I memorise squares and cubes for number series?

Yes. Knowing common squares and cubes can help you recognise patterns faster. Start with squares up to 30 and cubes up to 15, then revise them regularly.

Q7. Can I practise number series questions through a mock test?

Yes. You can use the NICL AO Mock Test to practise Quantitative Aptitude and review your performance. Check the available test features for topic-wise practice.

Q8. Where can I get a Number Series Questions for NICL AO PDF?

You can use available practice resources and save questions for revision. Visit the PracticeMock NICL AO test page to check the currently available practice tests and study materials.

Q9. What should I do if I cannot identify the pattern?

Do not spend too much time on one question. Check the differences, multiplication, and square or cube patterns. If the rule is still unclear, move on and return to the question after completing easier ones.

Mahima Jain

I am a content writer with over 8 years of experience in content writing and strategy, including 5+ years in the EdTech industry. I specialize in creating engaging, SEO-friendly content that helps students navigate competitive exams and make informed career decisions. My strength lies in simplifying complex topics into clear, user-focused content that is both informative and easy to understand.