#### Chapters

Chapter 2: Estimation

Chapter 3: Numbers in India and International System (With Comparison)

Chapter 4: Place Value

Chapter 5: Natural Numbers and Whole Numbers (Including Patterns)

Chapter 6: Negative Numbers and Integers

Chapter 7: Number Line

Chapter 8: HCF and LCM

Chapter 9: Playing with Numbers

Chapter 10: Sets

Chapter 11: Ratio

Chapter 12: Proportion (Including Word Problems)

Chapter 13: Unitary Method

Chapter 14: Fractions

Chapter 15: Decimal Fractions

Chapter 16: Percent (Percentage)

Chapter 17: Idea of Speed, Distance and Time

Chapter 18: Fundamental Concepts of algebra

Chapter 19: Fundamental Operations (Related to Algebraic Expressions)

Chapter 20: Substitution (Including Use of Brackets as Grouping Symbols)

Chapter 21: Framing Algebraic Expressions (Including Evaluation)

Chapter 22: Simple (Linear) Equations (Including Word Problems)

Chapter 23: Fundamental Concepts geometry

Chapter 24: Angles (With their Types)

Chapter 25: Properties of Angles and Lines (Including Parallel Lines)

Chapter 26: Triangles (Including Types, Properties and Constructions)

Chapter 27: Quadrilateral

Chapter 28: Polygons

Chapter 29: The Circle

Chapter 30: Revision Exercise Symmetry (Including Constructions on Symmetry)

Chapter 31: Recognition of Solids

Chapter 32: Perimeter and Area of Plane Figures

Chapter 33: Data Handling (Including Pictograph and Bar Graph)

Chapter 34: Mean and Median

## Chapter 8: HCF and LCM

### Selina solutions for Class 6 Mathematics Chapter 8 HCF and LCM Exercise 8 (A)

Write all the factors of 15

Write all the factors of 55

Write all the factors of 48

Write all the factors of 36

Write all the factors of 84

Write all prime numbers less than 25

Write all prime numbers between 15 and 35

Write all prime numbers between 8 and 76

Write the prime-numbers from 5 to 45

Write the prime-numbers from 2 to 32

Write the prime-numbers from 8 to 48

Write the prime-numbers from 9 to 59

Write the prime factors of 16

Write the prime factors of 27

Write the prime factors of 35

Write the prime factors of 49

If P_{n} means prime factors of n, find P_{6}

If P_{n} means prime factors of n, find P_{24}

If P_{n} means prime factors of n, find P_{50}

If P_{n} means prime factors of n, find P_{42}

### Selina solutions for Class 6 Mathematics Chapter 8 HCF and LCM Exercise 8 (B)

Using the common factor method, find the H.C.F. of 16 and 35

Using the common factor method, find the H.C.F. of 25 and 20

Using the common factor method, find the H.C.F. of 27 and 75

Using the common factor method, find the H.C.F. of 8, 12 and 18

Using the common factor method, find the H.C.F. of 24, 36, 45 and 60

Using the prime factor method, find the H.C.F. of 5 and 8

Using the prime factor method, find the H.C.F. of 24 and 49

Using the prime factor method, find the H.C.F. of 40, 60 and 80

Using the prime factor method, find the H.C.F. of 48, 84 and 88

Using the prime factor method, find the H.C.F. of 12, 16 and 28

Using the division method, find the H.C.F. of the following:

16 and 24

Using the division method, find the H.C.F. of the following:

18 and 30

Using the division method, find the H.C.F. of the following:

7, 14 and 24

Using the division method, find the H.C.F. of the following:

70,80,120 and 150

Using the division method, find the H.C.F. of the following:

32, 56 and 46

Use a method of your own choice to find the H.C.F. of 45, 75 and 135.

Use a method of your own choice to find the H.C.F. of 48, 36 and 96.

Use a method of your own choice to find the H.C.F. of 66, 33 and 132.

Use a method of your own choice to find the H.C.F. of 24, 36, 60, and 132.

Use a method of your own choice to find the H.C.F. of 30, 60, 90 and 105.

Find the greatest number that divides each of 180, 225 and 315 completely

Show that 45 and 56 are co-prime numbers.

Out of 15, 16, 21 and 28, find out all the pairs of co-prime numbers.

Find the greatest no. that will divide 93, 111, and 129, leaving remainder 3 in each case.

### Selina solutions for Class 6 Mathematics Chapter 8 HCF and LCM Exercise 8 (C)

Using the common multiple method, find the L.C.M. of the following:

8, 12 and 24

Using the common multiple method, find the L.C.M. of the following:

10, 15 and 20

Using the common multiple method, find the L.C.M. of the following:

3, 6, 9 and 12

Find the L.C.M. of the following group of numbers, using

- the prime factor method and
- the common division method

18, 24 and 96

Find the L.C.M. of the following group of numbers, using

- the prime factor method and
- the common division method

100, 150 and 200

Find the L.C.M. of the following group of numbers, using

- the prime factor method and
- the common division method

14, 21 and 98

Find the L.C.M. of the following group of numbers, using

- the prime factor method and
- the common division method

22, 121 and 33

Find the L.C.M. of the following group of numbers, using

- the prime factor method and
- the common division method

34, 85 and 51

The H.C.F. and the L.C.M. of two numbers are 50 and 300 respectively. If one of the numbers is 150, find the other one.

The product of two numbers is 432 and their L.C.M. is 72. Find their H.C.F.

The product of the two numbers is 19,200 and their H.C.F. is 40. Find their L.C.M.

Find the smallest number which, when divided by 12, 15, 18, 24 and 36 leaves no remainder

Find the smallest number which, when increased by one is exactly divisible by 12, 18, 24, 32 and 40

Find the smallest number which, on being decreased by 3, is completely divisible by 18, 36, 32 and 27.

### Selina solutions for Class 6 Mathematics Chapter 8 HCF and LCM Revision Exercise

Find the H.C.F. of 108, 288 and 420

Find the H.C.F. of 36, 54 and 138

Find the L.C.M. of 72, 80 and 252

Find the L.C.M. of 48, 66 and 120

**State true or false. Give an example.**

H.C.F. of two prime numbers is 1.

True

False

**State true or false. Give an example.**

H.C.F. of two co-prime numbers is 1.

True

False

**State true or false. Give an example.**

L.C.M. of two prime numbers is equal to their product.

True

False

**State true or false. Give an example.**

L.C.M. of two co-prime numbers is equal to their product.

True

False

The product of two numbers is 12096 and their H.C.F. is 36. Find their L.C.M.

The product of the H.C.F. and the L.C.M. of two numbers is 1152. If one number is 48, find the other one.

Find the smallest number that is completely divisible by 28 and 42.

Find the largest number that can divide 28 and 42 completely.

Find the L.C.M. of 140 and 168. Use the L.C.M. obtained to find the H.C.F. of the given numbers.

Find the H.C.F. of 108 and 450 and use the H.C.F. obtained to find the L.C.M. of the given numbers.

## Chapter 8: HCF and LCM

## Selina solutions for Class 6 Mathematics chapter 8 - HCF and LCM

Selina solutions for Class 6 Mathematics chapter 8 (HCF and LCM) include all questions with solution and detail explanation. This will clear students doubts about any question and improve application skills while preparing for board exams. The detailed, step-by-step solutions will help you understand the concepts better and clear your confusions, if any. Shaalaa.com has the CISCE Class 6 Mathematics solutions in a manner that help students grasp basic concepts better and faster.

Further, we at Shaalaa.com provide such solutions so that students can prepare for written exams. Selina textbook solutions can be a core help for self-study and acts as a perfect self-help guidance for students.

Concepts covered in Class 6 Mathematics chapter 8 HCF and LCM are Concept for HCF and LCM, Prime Factorization for HCF and LCM, Division Method for HCF and LCM, Property HCF x LCM = Product of Two Numbers.

Using Selina Class 6 solutions HCF and LCM exercise by students are an easy way to prepare for the exams, as they involve solutions arranged chapter-wise also page wise. The questions involved in Selina Solutions are important questions that can be asked in the final exam. Maximum students of CISCE Class 6 prefer Selina Textbook Solutions to score more in exam.

Get the free view of chapter 8 HCF and LCM Class 6 extra questions for Class 6 Mathematics and can use Shaalaa.com to keep it handy for your exam preparation