Class 9 Maths MCQ’s Chapter 1 Number System for unit tests & CBSE Board Exam 2021

The research team of the Future Study Point has selected 13 important questions of the chapter 1 Number system for class 9 CBSE students which are helpful in preparation of their next exams and unit tests. The purpose of these maths MCQ’s solutions of chapter 1 Number system is to upgrade your maths knowledge which is required for the study of higher class maths.We hope the solutions of maths MCQ.s of the chapter 1 Number system will clear your concept of maths clearly and boost your preparation of maths tests and exams.

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NCERT Solutions of class 9 maths

Chapter 1- Number System	Chapter 9-Areas of parallelogram and triangles
Chapter 2-Polynomial	Chapter 10-Circles
Chapter 3- Coordinate Geometry	Chapter 11-Construction
Chapter 4- Linear equations in two variables	Chapter 12-Heron’s Formula
Chapter 5- Introduction to Euclid’s Geometry	Chapter 13-Surface Areas and Volumes
Chapter 6-Lines and Angles	Chapter 14-Statistics
Chapter 7-Triangles	Chapter 15-Probability
Chapter 8- Quadrilateral

Class 9 Maths MCQ’s Chapter 1 Number System for unit tests & CBSE Board Exam 2021

Q1. The value of

Ans.(d)

Q2. Find the value of

(a) 8/15 (b) 2/9 (c) 9/125 (d) 3/5

Ans. (d) 3/5

Q3. Find the value of

(a) 1/18 (b) 1/3 (c) 27 (d) 81

Ans. (b) 1/3

Q4. Find the value of

(a) 1 (b) -1 (c) 671 (d) 5/6

Ans. (a) 1

= 6 – 5 = 1

Q5. Which of the following number is an irrational number ?

(a) √25 – 5 (b) (2 -√2)(2 + √2) (c) √7 + 2 (d) -√625

Ans. (c) √7 + 2

The sum of an irrational number and a rational number is an irratioal number ,√7 is an irrational number and 2 is rational,therefore √7 + 2 is an irrational number.

Q6. The decimal expansion of √3 is

(a) Finite decimal (b) 1.7321 (c) non-terminating recurring (d) non -terminating non-recurring

Ans.(d) non-terminating non-recurring

√3 is a surd and every surd is a non -terminating non-recurring decimal or an irrational number

Q7. If x = √3/2 and 7/x = K√3, then the value of K is

(a) 7/√3 (b) 14/3 (c) √7/3 (d) 3/14

Ans. (b) 14/3

We are given x = √3/2 and 7/x = K√3

Putting the value x =√3/2 in equation 7/x = K√3

7/√3/2 = K√3

K = (7×2)/(√3×√3) = 14/3

Q8. The sum of 0.5555….. and 0.6666….. is

(a) 11/9 (b) 7/9 (c) 7/10 (d) 5/99

Ans. (a) 11/9

Writting 0.5555… and 0.6666…. in the form of P/Q

Let x = 0.5555….(i) and y = 0.6666….(ii)

10 x = 5.555……(iii) and 10 y = 6.666…(iv)

Subtracting equation (i) from equation (iii) and equation (ii) from equation (iv)

9x = 5 and 9y = 6

x = 5/9 and y = 6/9

∴ x + y = 5/9 + 6/9 = 11/9

Q9. √24 ×√32 is equal to

(a) 16√3 (b) 8√6 (c) 24√3 (d) 32√3

Ans.(a) 16√3

√24 ×√32

√[(2×2×2×3) ×(2×2×2×2×2)]

2×2×2×2√3 = 16√3

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Q10. Find the value of (10⁰ +5⁰ )/100⁰

(a) 2 (b) 0 (c) 3/20 (d) 5/100

Ans. (a) 2

(10⁰ +5⁰ )/100⁰ = (1 +1)/1 = 2/1 = 2

Q11. A rational number lying between √2 and √3

(a) 3/2 (b) √6 (c) (√2 +√3)/2 (d) 1.8

Ans. 3/2

The decimal expansion of √2 upto one place is = 1.4 and of √3 =1.7

Among all alternatives the value of 3/2 = 1.5 is between √2 and √3

Q12. The ascending order of the value is

Ans. The given surds are

Converting them into exponents

Writting the equivalent fraction of their power (i.e 1/2,1/3 and 1/4) = 6/12, 4/12 and 3/12

Now, the exponent forms of the given surds become

Writting them in the form of surds

All the surds are of the same order,now we can compare them by calculating their exponential part

729, 154 and 216

Q13. The value of a and b in (3 – 2√2)/(3 + 2√2) = a + b√2 is

Ans. (3 -2√2)/(3 +2√2) =a + b√2

Multiplying the denominator and numerator by the conjugate of the denominator (3 – 2√2)

(3 -2√2)(3 -2√2)/(3 +2√2)(3 -2√2) = a + b√2

Applying the identity (x -y)² = x² +y² -2xy and x² – y² = (x + y)( x -y)

(9 + 8 – 12√2)/(9 – 8) = a + b√2

17 + (-12 √2) = a + b√2

Comparing LHS and RHS

a = 17, b = -12

These Maths MCQ questions are helpful for 9 class exams as well as for competitive entrance exams like Bank, CPO, Railways, Army, etc. We hope you would have liked the post, for any type of update information please subscribe our web site, here you can study NCERT Solutions, solution of previous year’s question papers and sample papers and our blogs on a different topic of science, physics, chemistry, biology, and maths.

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NCERT Solutions of class 9 science

Chapter 1-Matter in our surroundings	Chapter 9- Force and laws of motion
Chapter 2-Is matter around us pure?	Chapter 10- Gravitation
Chapter3- Atoms and Molecules	Chapter 11- Work and Energy
Chapter 4-Structure of the Atom	Chapter 12- Sound
Chapter 5-Fundamental unit of life	Chapter 13-Why do we fall ill ?
Chapter 6- Tissues	Chapter 14- Natural Resources
Chapter 7- Diversity in living organism	Chapter 15-Improvement in food resources
Chapter 8- Motion	Last years question papers & sample papers

CBSE Class 9-Question paper of science 2020 with solutions

CBSE Class 9-Sample paper of science

CBSE Class 9-Unsolved question paper of science 2019

NCERT Solutions of class 10 maths

Chapter 1-Real number	Chapter 9-Some application of Trigonometry
Chapter 2-Polynomial	Chapter 10-Circles
Chapter 3-Linear equations	Chapter 11- Construction
Chapter 4- Quadratic equations	Chapter 12-Area related to circle
Chapter 5-Arithmetic Progression	Chapter 13-Surface areas and Volume
Chapter 6-Triangle	Chapter 14-Statistics
Chapter 7- Co-ordinate geometry	Chapter 15-Probability
Chapter 8-Trigonometry

CBSE Class 10-Question paper of maths 2021 with solutions

CBSE Class 10-Half yearly question paper of maths 2020 with solutions

CBSE Class 10 -Question paper of maths 2020 with solutions

CBSE Class 10-Question paper of maths 2019 with solutions

NCERT solutions of class 10 science

Chapter 1- Chemical reactions and equations	Chapter 9- Heredity and Evolution
Chapter 2- Acid, Base and Salt	Chapter 10- Light reflection and refraction
Chapter 3- Metals and Non-Metals	Chapter 11- Human eye and colorful world
Chapter 4- Carbon and its Compounds	Chapter 12- Electricity
Chapter 5-Periodic classification of elements	Chapter 13-Magnetic effect of electric current
Chapter 6- Life Process	Chapter 14-Sources of Energy
Chapter 7-Control and Coordination	Chapter 15-Environment
Chapter 8- How do organisms reproduce?	Chapter 16-Management of Natural Resources

Solutions of class 10 last years Science question papers

CBSE Class 10 – Question paper of science 2020 with solutions

CBSE class 10 -Latest sample paper of science

NCERT solutions of class 11 maths

Chapter 1-Sets	Chapter 9-Sequences and Series
Chapter 2- Relations and functions	Chapter 10- Straight Lines
Chapter 3- Trigonometry	Chapter 11-Conic Sections
Chapter 4-Principle of mathematical induction	Chapter 12-Introduction to three Dimensional Geometry
Chapter 5-Complex numbers	Chapter 13- Limits and Derivatives
Chapter 6- Linear Inequalities	Chapter 14-Mathematical Reasoning
Chapter 7- Permutations and Combinations	Chapter 15- Statistics
Chapter 8- Binomial Theorem	Chapter 16- Probability

CBSE Class 11-Question paper of maths 2015

CBSE Class 11 – Second unit test of maths 2021 with solutions

NCERT solutions of class 12 maths

Chapter 1-Relations and Functions	Chapter 9-Differential Equations
Chapter 2-Inverse Trigonometric Functions	Chapter 10-Vector Algebra
Chapter 3-Matrices	Chapter 11 – Three Dimensional Geometry
Chapter 4-Determinants	Chapter 12-Linear Programming
Chapter 5- Continuity and Differentiability	Chapter 13-Probability
Chapter 6- Application of Derivation	CBSE Class 12- Question paper of maths 2021 with solutions
Chapter 7- Integrals
Chapter 8-Application of Integrals