Sindh University Mathematics Chapter 1 MCQs - Number System

Chapter 1 (Number System) is one of the most important chapters in Sindh University Mathematics. Every year, multiple questions appear from this chapter in the actual exam. Practice these solved MCQs covering Real Numbers, Complex Numbers, Rational & Irrational, Absolute Value to strengthen your preparation. All questions include correct answers and detailed explanations written by experts.

10+ MCQs With Answers Explanations Updated 2026
Real Numbers Complex Numbers Rational & Irrational Absolute Value

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We have carefully curated MCQs from Chapter 1 (Number System) following the official Sindh University 2026 syllabus. Each question comes with the correct answer and detailed explanation.

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Number System - Solved MCQs with Explanations

Below are important MCQs from Sindh University Mathematics Chapter 1 (Number System). Each question includes the correct answer highlighted in green and a detailed explanation to help you understand the concept.

Q1 Easy Real Numbers

Natural numbers are:

A {0,1,2,3,...}
B {1,2,3,4,...}
C {...,-2,-1,0,1,2,...}
D {1,3,5,7,...}
Explanation

Natural numbers (N) = counting numbers starting from 1: {1,2,3,4,...}. No zero, negatives, or fractions.

Q2 Easy Absolute Value

|(-7)| equals:

A -7
B 7
C 0
D 1/7
Explanation

Absolute value |x| = distance from 0, always non-negative. |-7| = 7.

Q3 Easy Number Systems

Which is irrational?

A 3/4
B 0.5
C sqrt(2)
D 22/7
Explanation

sqrt(2) = 1.41421... is irrational (non-terminating, non-repeating decimal, cannot be expressed as p/q).

Q4 Easy Complex Numbers

i^2 equals:

A 1
B -1
C i
D -i
Explanation

i = sqrt(-1), so i^2 = -1. This is the fundamental property of complex numbers.

Q5 Easy Complex Numbers

Conjugate of 3+4i:

A 3-4i
B -3+4i
C -3-4i
D 4+3i
Explanation

Conjugate of a+bi is a-bi. So conjugate of 3+4i = 3-4i. Product of conjugates is always real.

Q6 Easy Real Numbers

sqrt(2) x sqrt(3) =

A sqrt(5)
B sqrt(6)
C 6
D 5
Explanation

sqrt(a) x sqrt(b) = sqrt(ab). So sqrt(2) x sqrt(3) = sqrt(6).

Q7 Medium Absolute Value

|x| = -5 has:

A Two solutions
B One solution
C No solution
D Infinite solutions
Explanation

Absolute value >= 0 always. Since -5 < 0, no solution exists.

Q8 Easy Number Systems

A rational number is:

A A square root
B p/q where q is not 0
C Irrational
D A prime
Explanation

Rational numbers = p/q where p,q are integers and q != 0. Examples: 1/2, -3/4, 5 (=5/1).

Q9 Medium Complex Numbers

|3+4i| equals:

A 5
B 7
C 25
D 1
Explanation

Modulus of a+bi = sqrt(a^2+b^2). |3+4i| = sqrt(9+16) = sqrt(25) = 5.

Q10 Easy Number Systems

Pi is classified as:

A Rational
B Irrational
C Integer
D Natural
Explanation

Pi = 3.14159... is irrational (infinite, non-repeating decimal). 22/7 is only an approximation.

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What You'll Learn in Number System

Number System is a fundamental chapter in Sindh University Mathematics. This chapter covers the following important topics that frequently appear in the Sindh University exam:

By practicing these MCQs, you will develop a strong understanding of Number System concepts and be well-prepared for the Sindh University 2026 exam.

How to Prepare Number System for Sindh University 2026

Follow these expert tips to master Number System and score maximum marks in Sindh University:

  1. Read the textbook carefully - Cover all concepts in Chapter 1 (Number System) from your Mathematics textbook first.
  2. Make short notes - Write down key definitions, formulas, and important points for quick revision.
  3. Practice MCQs daily - Solve at least 20-30 MCQs from Number System every day using Apna MCQs platform.
  4. Review explanations - Read the detailed explanations for each MCQ to understand the concept, not just memorize answers.
  5. Take timed tests - Practice under exam conditions using our Sindh University mock tests to improve speed and accuracy.
  6. Focus on weak areas - Identify topics in Number System where you score low and practice more MCQs on those specific topics.

Important Topics in Number System for Sindh University

Based on analysis of past Sindh University papers, these topics from Chapter 1 (Number System) are most frequently tested:

Real Numbers High frequency in Sindh University
Complex Numbers Very High frequency in Sindh University
Rational & Irrational Medium frequency in Sindh University
Absolute Value High frequency in Sindh University

Frequently Asked Questions

How many MCQs come from Number System in Sindh University 2026?

In Sindh University, Mathematics typically has 100 total MCQs. Chapter 1 (Number System) usually contributes 3-5 MCQs in the actual exam. On Apna MCQs, we provide 10+ practice MCQs with detailed explanations for thorough preparation.

Are these Sindh University Mathematics Chapter 1 MCQs updated for 2026?

Yes! All MCQs on Apna MCQs are updated according to the latest University of Sindh Sindh University 2026 syllabus. Our team of expert educators regularly reviews and adds new questions based on the latest exam patterns and past papers.

What topics are covered in Number System MCQs?

Our Number System MCQs cover all important topics including Real Numbers, Complex Numbers, Rational & Irrational and more. Each topic has multiple MCQs ranging from easy to hard difficulty to ensure comprehensive preparation.

How to prepare Number System for Sindh University?

To prepare Number System for Sindh University: 1) Read the textbook thoroughly, 2) Make notes of key concepts, 3) Practice MCQs on Apna MCQs with explanations, 4) Take mock tests, 5) Review weak areas. Our chapter-wise approach ensures you cover all 21 chapters systematically.

Where can I practice more Sindh University Mathematics MCQs?

After completing Chapter 1, move to the next chapter on Apna MCQs. We cover all 21 chapters of Mathematics with chapter-wise MCQs. You can also take full-length Sindh University mock tests for timed practice.

Are these MCQs from Sindh University past papers?

Our MCQs include questions modeled on Sindh University past papers as well as original questions created by subject experts. The questions cover all topics in Number System that are part of the official Sindh University syllabus.

Can I use these MCQs for board exam preparation too?

Absolutely! While these MCQs are organized for Sindh University preparation, the content covers the same Mathematics Chapter 1 (Number System) topics tested in FSc/Inter board exams. Many students use Apna MCQs for both board and entry test preparation.

Is Apna MCQs free to use?

Yes! Apna MCQs provides free access to chapter-wise MCQs for MDCAT, ECAT, LAT, IBA, Nursing and other entry tests. We believe quality education should be accessible to every student in Pakistan.