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LCM Worksheet for Class 5 Maths: Find the Lowest Common Multiple

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How to Find the LCM of 2 and 30 (Step-by-Step Guide)

Explore Class 5 maths basics with this fun worksheet on finding the lowest common multiple (LCM) of 2 and 30. Each question uses fill in the blanks and simple problems, making it ideal for practising LCM concepts at your own pace.


Students strengthen number sense as they learn how to find the LCM step by step. Practice helps answer questions like “What is the lowest common multiple of 2 and 30?” and solve problems involving 2, 3, and 5. Use this worksheet for homework, revision, or quick test prep sessions.


Download the printable PDF for extra practice. It’s a great way to build strong maths foundations and boost confidence in solving multiples and common factors!


Grade 5 Maths Lowest Common Multiple (LCM) Worksheets

Section 1: Find the Lowest Common Multiple (LCM)

Instructions: Find the LCM for each pair of numbers below. Show your work in the space provided (if needed).


1. Find the LCM of 8 and 12.

_________________________


2. Find the LCM of 15 and 20.

_________________________


3. Find the LCM of 9 and 27.

_________________________


4. Find the LCM of 14 and 21.

_________________________


5. Find the LCM of 6 and 11.

_________________________


6. Find the LCM of 18 and 24.

_________________________


7. Find the LCM of 25 and 30.

_________________________


8. Find the LCM of 7 and 13.

_________________________


Section 2: Multiple Choice Questions (MCQs)

Instructions: Read each question carefully and circle the letter of the correct answer.


1. What is the Lowest Common Multiple (LCM) of 4 and 10?

(a) 40

(b) 20

(c) 10

(d) 4


2. The LCM of 12 and 16 is:

(a) 16

(b) 24

(c) 48

(d) 96


3. Which of the following pairs has an LCM of 60?

(a) 10 and 20

(b) 15 and 30

(c) 12 and 20

(d) 5 and 6


4. The first common multiple of 3 and 7 is also known as their LCM. What is it?

(a) 3

(b) 7

(c) 21

(d) 42


Section 3: True or False

Instructions: Read each statement and write 'True' or 'False' on the line provided.


1. The LCM of two prime numbers is always their product.

_________________


2. The LCM of 5 and 10 is 5.

_________________


3. The LCM of two numbers can never be smaller than both the numbers.

_________________


4. If one number is a multiple of another, their LCM is the smaller number.

_________________


Section 4: Match the Columns

Instructions: Match the pair of numbers in Column A with their correct LCM in Column B.


Column A (Number Pairs)

Column B (LCM)

Your Answer (e.g., 1-c) 

1. (4, 9)

a. 30


2. (10, 15)

b. 77


3. (8, 28)

c. 100


4. (20, 25)

d. 36


5. (7, 11)

e. 56



Section 5: Short Answer Questions

Instructions: Read the word problems and write your answer in the space below.


1. Two lighthouses flash their lights at different intervals. One flashes every 12 seconds and the other every 18 seconds. If they flash at the same time, after how many seconds will they next flash together?

____________________________________________________________________


2. At a party, hot dogs are sold in packs of 10 and buns in packs of 8. If you want to have an equal number of hot dogs and buns, what is the minimum number of each you must buy?

____________________________________________________________________


Answer Key

Section 1: Find the Lowest Common Multiple (LCM)

1. 24 (Multiples of 8: 8, 16, 24; Multiples of 12: 12, 24)

2. 60 (Multiples of 15: 15, 30, 45, 60; Multiples of 20: 20, 40, 60)

3. 27 (27 is a multiple of 9)

4. 42 (Multiples of 14: 14, 28, 42; Multiples of 21: 21, 42)

5. 66 (6 and 11 are co-prime, so LCM is 6 x 11)

6. 72 (Multiples of 18: 18, 36, 54, 72; Multiples of 24: 24, 48, 72)

7. 150 (Prime factors of 25: 5x5; Prime factors of 30: 2x3x5. LCM = 2x3x5x5 = 150)

8. 91 (7 and 13 are prime, so LCM is 7 x 13)


Section 2: Multiple Choice Questions (MCQs)

1. (b) 20

2. (c) 48

3. (c) 12 and 20

4. (c) 21


Section 3: True or False

1. True

2. False (The LCM is 10)

3. True

4. False (The LCM is the larger number)


Section 4: Match the Columns

1. d (LCM of 4 and 9 is 36)

2. a (LCM of 10 and 15 is 30)

3. e (LCM of 8 and 28 is 56)

4. c (LCM of 20 and 25 is 100)

5. b (LCM of 7 and 11 is 77)


Section 5: Short Answer Questions

1. 36 seconds. (The LCM of 12 and 18 is 36.)

2. 40 hot dogs and 40 buns. (The LCM of 10 and 8 is 40. This means you need to buy 4 packs of hot dogs (4x10=40) and 5 packs of buns (5x8=40).)


How LCM Worksheets Help Class 5 Students Master Multiples

By working through this Class 5 Maths worksheet on Lowest Common Multiple 2 to 30, learners sharpen their ability to find LCMs between numbers. This topic helps kids tackle word problems and quick quizzes with more confidence. 


Students learn how LCM fits into everyday calculations, preparing them for topics like Least Common Denominator. Parents can easily use this sheet for extra multiplication and division practice at home.


Discover Easy Ways to Solve LCM Problems

This worksheet guides Class 5 students through clear, step-by-step questions on LCM, making the Maths topic feel simple and fun. 


Kids practice methods like listing multiples and prime factorization, which often appear in sample questions and exams. Understanding Lowest Common Multiple lays the groundwork for more complex subject areas, such as fractions. This extra practice supports strong numeracy, helping families track classroom progress.

FAQs on LCM Worksheet for Class 5 Maths: Find the Lowest Common Multiple

1. What is the lowest common multiple of 2 and 30?

The lowest common multiple (LCM) of 2 and 30 is 30. This is the smallest number that is a multiple of both 2 and 30. To find the LCM, list the multiples of each number and pick the smallest one they have in common.

2. How to find LCM for class 5th?

To find the LCM for class 5th, use these steps:

  • List the multiples of each number.
  • Identify common multiples.
  • The smallest common multiple is the LCM.
For example, for 2 and 30, the LCM is 30. You can also use the prime factorization method for bigger numbers.

3. What is the lowest common multiple of 2, 3, and 5?

The lowest common multiple of 2, 3, and 5 is 30. It is the smallest number that all three numbers divide into exactly. This is found by multiplying their highest powers of prime factors or by listing their multiples and picking the smallest in common.

4. How to do LCM step by step?

To find the LCM step by step:

  1. List multiples of each number.
  2. Circle the common multiples.
  3. The smallest one is the LCM.
For bigger numbers, use the prime factorization method by multiplying the highest power of all prime factors appearing in the numbers.

5. What is an LCM worksheet for grade 5?

An LCM worksheet for grade 5 is a printable practice page with questions that help students learn and practice finding the lowest common multiple of numbers. It usually includes examples, fill-in-the-blank exercises, matching activities, and sometimes answer keys for student and parent reference.

6. How can I use this worksheet at home?

You can use this worksheet at home for extra practice, revision before tests, or holiday learning. Simply download and print the worksheet, complete the exercises (like finding LCMs), and check your answers using the provided answer key for feedback and improvement.

7. Does this LCM worksheet include an answer key?

Yes, the LCM worksheet for class 5 maths includes an answer key. This helps students and parents check answers after solving the problems. The key supports self-learning and ensures correct understanding of LCM concepts.

8. Is this worksheet printable?

Yes, the class 5 LCM worksheet is printable. You can download the worksheet as a PDF and print it for classroom activities, homework, or home learning. The design is student-friendly with clear fonts and instructions.

9. What age group or grade is this worksheet best for?

This LCM worksheet is ideal for grade 5 students, typically aged 9 to 11. It is designed to match the class 5 maths syllabus and supports understanding of LCM and multiples.

10. Is this worksheet aligned with the Class 5 maths syllabus?

Yes, the worksheet follows the class 5 maths syllabus and covers essential topics like finding LCM, multiples, and divisibility rules. It uses age-appropriate questions and formats for effective concept reinforcement.

11. What skills are built by this activity?

This activity builds number sense, understanding of common multiples, and strengthens problem-solving skills. It also reinforces concepts like factors, divisibility, and logical thinking as outlined in the Class 5 curriculum.

12. Can I use this worksheet digitally on a tablet?

Yes, you can use the worksheet digitally on a tablet by opening the PDF file and solving the questions using a stylus or PDF editor app. This is handy for mobile learning and paperless practice.

13. How does this worksheet reinforce concept retention?

The worksheet uses stepwise problems, matching exercises, and visuals to help students practice and retain the LCM concept. Regular practice encourages faster recall and stronger maths foundation for class tests.