Prime Factor Method: Challenge & Extension

Mathematics
Grade 8
11 questions
~22 mins
1 views0 downloads

About This Worksheet

A worksheet designed to deepen understanding of finding the LCM using the Prime Factor Method, including procedural practice and challenging extension questions for Grade 8 students.

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Full preview • 11 questions

Prime Factor Method: Challenge & Extension

Subject: MathematicsGrade: Grade 8
Name:
Date:
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Untitled Worksheet

Grade Grade 8
A

Practice Questions

Answer all questions. Show your working clearly in the grid spaces provided.
1.
Find the prime factorization of 56.
[2 marks]
2.
Find the prime factorization of 90.
[2 marks]
3.
Calculate the LCM of 48 and 180 using the Prime Factor Method.
[3 marks]
4.
Determine the LCM of 24, 36, and 60 by prime factorization.
[3 marks]
5.
Explain why the prime factorization method guarantees finding the LCM of two numbers.
[3 marks]
6.
The numbers 84 and 126 are both divisible by 3. Find their LCM using prime factors and verify your answer by listing multiples.
[4 marks]
7.
Calculate the LCM of 105 and 140 using prime factorization. Show each step.
[4 marks]
8.
A school schedules events every 12 days and every 15 days. When will both events occur on the same day? Find the answer using the Prime Factor Method.
[4 marks]
9.
Find the LCM of 72 and 108, then explain the prime factorization process you used.
[3 marks]
10.
Identify and correct the mistake in this prime factorization for 84: 2^2 * 3 * 7.
[2 marks]
11.
Construct a set of three numbers with different prime factors and find their LCM using prime factorization. Justify your choices.
[4 marks]

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Details

Created
1/1/2026
Updated
1/1/2026
Type
worksheet