# model 1 basic number system Practice Questions Answers Test with Solutions & More Shortcuts

#### number system PRACTICE TEST [6 - EXERCISES]

Question : 1 [R.R.B. 2006]

All natural numbers and 0 are called as _______ numbers.

a) Rational

b) Integers

c) Whole

d) Prime

The counting numbers {1, 2, 3, ...} are commonly called natural numbers; however, include 0, so that the non-negative integers {0, 1, 2, 3, ...} are also called natural numbers.

Natural numbers including 0 are also called whole numbers.

Also, Refer to Types of Numbers.

Question : 2

Consider the following statements about natural numbers: (1) There exists a smallest natural number. (2) There exists a largest natural number. (3) Between two natural numbers, there is always a natural number. Which of the above statements is/are correct?

a) None

b) Only 1

c) 1 and 2

d) 2 and 3

1) There exists the smallest natural number - which is 1. So, true.

2) There exists a largest natural number - there is no upper limit to numbers. So, false.

3) Between two natural numbers there is always a natural number - for example, between 1 and 2 there is no natural number. So, false.

Hence, only option 1 is true.

Question : 3

Every rational number is also

a) an integer

b) a real number

c) a natural number

d) a whole number

Both rational and irrational numbers taken together are called Real numbers.

Therefore, every real number is either a rational number or an irrational number. Hence, every rational number is a real number.

Hence, (B) is the correct option.

Question : 4 [R.R.B., 2005]

The number \$π\$ is

a) a fraction

b) a recurring decimal

c) a rational number

d) an irrational number

Pi (\$π\$) is an irrational number

π is an irrational number that has a value of 22/7 or 3.142…and is a never-ending and non-repeating number.

Irrational numbers are non-terminating

Question : 5

\$√2\$ is a/an

a) rational number

b) natural number

c) irrational number

d) integer

## Recently Added Subject & Categories For All Competitive Exams

#### Top 149+ Biology General Knowledge Practice MCQ Test

Top Biology Ecology & Environment Awareness General Knowledge Multiple Choice Questions And Answers. General Science GK Practice Test For Competitive Exams

December-16-2022 by Careericons

#### Important General Science Biology Practice MCQ Questions

Top General Science Biology In Human Welfare Based Multiple Choice Questions And Answers, Practice MCQ Test For All Competitive Exams, NEET, SSC, Interview

December-06-2022 by Careericons

#### Top 199+ General Science Biology Practice Test, MCQ PDF

Most Important General Science Biology Human Welfare Multiple Choice Questions And Answers (MCQ) PDF, Practice Test For All Competitive Exams, SSC, NEET, RRB

December-01-2022 by Careericons

#### New General Science Biology MCQ Online Practice Test, PDF

Top Most General Science Biology Food Production Multiple Choice Questions And Answers (MCQ), Online GK Practice Test, PDF For All Competitive Exams, NEET

November-29-2022 by Careericons