#### Online Mock Tests

#### Chapters

Chapter 2: Polynomials

Chapter 3: Pair of Linear Equations in Two Variables

Chapter 4: Quadratic Equations

Chapter 5: Arithmetic Progressions

Chapter 6: Triangles

Chapter 7: Coordinate Geometry

Chapter 8: Introduction to Trigonometry

Chapter 9: Some Applications of Trigonometry

Chapter 10: Circles

Chapter 11: Constructions

Chapter 12: Areas Related to Circles

Chapter 13: Surface Areas and Volumes

Chapter 14: Statistics

Chapter 15: Probability

## Solutions for Chapter 1: Real Numbers

Below listed, you can find solutions for Chapter 1 of CBSE NCERT for Class 10 Maths.

### NCERT solutions for Class 10 Maths Chapter 1 Real Numbers Exercise 1.1 [Page 7]

Using Euclid's division algorithm, find the H.C.F. of 135 and 225

Using Euclid's division algorithm, find the H.C.F. of 196 and 38220

Using Euclid's division algorithm, find the H.C.F. of (iii) 867 and 255

Show that any positive integer which is of the form 6q + 1 or 6q + 3 or 6q + 5 is odd, where q is some integer.

An army contingent of 616 members is to march behind an army band of 32 members in a parade. The two groups are to march in the same number of columns. What is the maximum number of columns in which they can march?

** **Use Euclid's Division Algorithm to show that the square of any positive integer is either of the form 3m or 3m + 1 for some integer m.

Use Euclid's Division Algorithm to show that the cube of any positive integer is either of the 9m, 9m + 1 or 9m + 8 for some integer m

### NCERT solutions for Class 10 Maths Chapter 1 Real Numbers Exercise 1.2 [Page 11]

Express the number as a product of its prime factor:

140

Express the number as a product of its prime factor:

156

Express the number as a product of its prime factor:

3825

Express the number as a product of its prime factor:

5005

Express the number as a product of its prime factor:

7429

Find the LCM and HCF of the following pair of integers and verify that LCM × HCF = product of the two numbers

26 and 91

Find the LCM and HCF of the following pair of integers and verify that LCM × HCF = product of the two numbers

510 and 92

Find the LCM and HCF of the following pair of integers and verify that LCM × HCF = product of the two numbers

336 and 54

Find the LCM and HCF of the following integers by applying the prime factorisation method

12, 15 and 21

Find the LCM and HCF of the following integers by applying the prime factorisation method

17, 23 and 29

Find the LCM and HCF of the following integers by applying the prime factorisation method

8, 9 and 25

Given that HCF (306, 657) = 9, find LCM (306, 657).

Check whether 6n can end with the digit 0 for any natural number n.

Explain why 7 × 11 × 13 + 13 and 7 × 6 × 5 × 4 × 3 × 2 × 1 + 5 are composite numbers.

There is a circular path around a sports field. Sonia takes 18 minutes to drive one round of the field, while Ravi takes 12 minutes for the same. Suppose they both start at the same point and at the same time, and go in the same direction. After how many minutes will they meet again at the starting point?

### NCERT solutions for Class 10 Maths Chapter 1 Real Numbers Exercise 1.3 [Page 14]

Prove that `sqrt5` is irrational.

Prove that 3 + 2`sqrt5` is irrational

Prove that the following is irrational

`1/sqrt2`

Prove that the following is irrational

` 7sqrt5`

Prove that the following are irrationals

` 6+sqrt2`

### NCERT solutions for Class 10 Maths Chapter 1 Real Numbers Exercise 1.4 [Pages 17 - 18]

State whether the following rational number will have a terminating decimal expansion or a non-terminating repeating decimal expansion:

`13/3125`

State whether the following rational number will have a terminating decimal expansion or a non-terminating repeating decimal expansion:

`17/8`

State whether the following rational number will have a terminating decimal expansion or a non-terminating repeating decimal expansion:

`64/455`

`15/1600`

`29/343`

`23/(2^3xx5^2)`

`129/(2^2xx5^7xx7^5)`

`6/15`

`35/50`

`77/210`

Write down the decimal expansion of the following number which have terminating decimal expansion.

`13/3125`

Write down the decimal expansion of the following number which have terminating decimal expansion.

`17/8`

Write down the decimal expansion of the following number which have terminating decimal expansion.

`64/455`

Write down the decimal expansion of the following number which have terminating decimal expansion.

`15/1600`

Write down the decimal expansion of the following number which have terminating decimal expansion.

`29/343`

Write down the decimal expansion of the following number which have terminating decimal expansion.

`23/(2^3xx5^2)`

Write down the decimal expansion of the following number which have terminating decimal expansion.

`129/(2^2xx5^7xx7^5)`

Write down the decimal expansion of the following number which have terminating decimal expansion.

`6/15`

Write down the decimal expansion of the following number which have terminating decimal expansion.

`35/50`

Write down the decimal expansion of the following number which has a terminating decimal expansion.

`77/210`

The following real number have decimal expansions as given below. In the following case, decide whether it is rational or not. If it is rational, and of the form p/q what can you say about the prime factors of q?

43.123456789

The following real number have decimal expansions as given below. In the following case, decide whether it is rational or not. If it is rational, and of the form p/q what can you say about the prime factors of q?

0.120120012000120000. . .

The following real number have decimal expansions as given below. In the following case, decide whether it is rational or not. If it is rational, and of the form p/q what can you say about the prime factors of q?

`43.bar(123456789)`

## Solutions for Chapter 1: Real Numbers

## NCERT solutions for Class 10 Maths chapter 1 - Real Numbers

Shaalaa.com has the CBSE Mathematics Class 10 Maths CBSE solutions in a manner that help students grasp basic concepts better and faster. The detailed, step-by-step solutions will help you understand the concepts better and clarify any confusion. NCERT solutions for Mathematics Class 10 Maths CBSE 1 (Real Numbers) include all questions with answers and detailed explanations. This will clear students' doubts about questions and improve their application skills while preparing for board exams.

Further, we at Shaalaa.com provide such solutions so students can prepare for written exams. NCERT textbook solutions can be a core help for self-study and provide excellent self-help guidance for students.

Concepts covered in Class 10 Maths chapter 1 Real Numbers are Introduction of Real Numbers, Real Numbers Examples and Solutions, Euclid’s Division Lemma, Fundamental Theorem of Arithmetic, Fundamental Theorem of Arithmetic Motivating Through Examples, Proofs of Irrationality, Rational Numbers and Their Decimal Expansions, Concept of Irrational Numbers, Introduction of Real Numbers, Real Numbers Examples and Solutions, Euclid’s Division Lemma, Fundamental Theorem of Arithmetic, Fundamental Theorem of Arithmetic Motivating Through Examples, Proofs of Irrationality, Rational Numbers and Their Decimal Expansions, Concept of Irrational Numbers.

Using NCERT Class 10 Maths solutions Real Numbers exercise by students is an easy way to prepare for the exams, as they involve solutions arranged chapter-wise and also page-wise. The questions involved in NCERT Solutions are essential questions that can be asked in the final exam. Maximum CBSE Class 10 Maths students prefer NCERT Textbook Solutions to score more in exams.

Get the free view of Chapter 1, Real Numbers Class 10 Maths additional questions for Mathematics Class 10 Maths CBSE, and you can use Shaalaa.com to keep it handy for your exam preparation.