Avatto > UGC NET PAPER 1 > PRACTICE QUESTIONS > Mathematical Reasoning > Number Series

Mathematical Reasoning MCQ - Number Series

11 0, 3, 8, 15, 24, 35, 48, 63, ...

The series is 1² − 1, 2² − 1, 3² − 1 and so on. The next number is 9² − 1 = 80.
Alternative solution: The differences between the numbers across the series are 3, 5, 7, 9, 11, 13, 15 and 17. The next number is 63 + 17 = 80.

12 2, 5, 10, 17, 26, 37, ..., 65

The series is 1² + 1, 2² + 1, 3² + 1 and so on. The next number is 7² + 1 = 50.

13 0, 2, 6, 12, 20, 30, ..., 56

The series is 0² + 0, 1² + 1, 2² + 2, 3² +3 and so on. The missing number is 6² +6 = 42. The next number = 6² + 6 = 42.
First alternative solution V The series is 0 × 1,1 × 2, ....... 1 × 2, 2 × 3, 3 × 4, 4 × 5 and 5 × 6 = 30. The next number is 6 × 7 = 42.
Second alternative solution : The series is 1² − 1, 2² − 2, 3² − 3, 4² − 4, 5² − 5, 6² − 6, 7² − 7, 8² − 8 and so on.

14 1, 8, 27, 64, 125, 216, ...

The series is 1³ , 2³ , 3³ , etc. The missing number is 7³ = 343.

15 2, 9, 28, 65, 126, 217, 344, ...

The series is 1³ + 1, 2³ + 1, 3³ + 1 and so on. Thus, the missing number is 8³ + 1 = 513.

Subtopics Covered

View All Subtopics

Quick Links

Difficulty Distribution

Easy 33%
Medium 33%
Hard 34%

Upcoming Papers

UPCOMING -- DATE PENDING

The official exam dates for the upcoming UGC NET December 2026 cycle have not been announced yet. The day countdown will appear automatically after the API provides an exact official exam date.

Your Progress

0%

Start Practising!

You've answered 0 of 35 questions in this topic.

Practice Spotlight

Geometric Progression

A geometric progression follows a constant multiplication or division ratio between consecutive terms. Checking ratios rather than differences can quickly reveal patterns involving rapid growth or decline.

Day 9 / 10

Global Spotlight

Challenge Your Accuracy

Strong work at 0% accuracy. Attempt the hardest Number Series questions and explain why every incorrect option is wrong.

Day 2 / 10

Question Spotlight

Question:

720, 120, 24, 6, ..., 1

A. 1
B. 2
C. 3
D. 4

Correct answer: B

Explanation:

720 divided by 6 = 120 120 divided by 5 = 24 24 divided by 4 = 6 6 divided by 3 = 2 2 divided by 2…

Click to view the complete question details

Day 8 / 10 Open this question

Community Insight

Based on 353 saved attempts

Most Attempted TopicAnalogy
Most Challenging TopicCoding Decoding
Average Accuracy99%

Featured Question

(Based on recent community answers)

Q. #1963550% Incorrect

Find the missing number in the following series. 23, 33, 46, 62, 81, 103,?

Try This Question →

This Week's Challenge

Complete 20 questions and set the community benchmark!

0 / 20 Start Challenge →

Why Practice with Avatto?

High Quality MCQsExam-focused questions with accurate answers

Detailed ExplanationsStep-by-step explanations to enhance learning

Latest Exam PatternBased on updated syllabus and pattern

Performance AnalyticsTrack performance and improve weak areas

100% Free PracticePractice unlimited questions for free

Forgot your password?

I agree with the Terms.