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Basic Math

Greatest Common Factors (GCF)- Home
- UK Year 11 Maths
- Number System

Still Confused?

Try reviewing these fundamentals first.

Basic Math

Greatest Common Factors (GCF)Still Confused?

Try reviewing these fundamentals first.

Basic Math

Greatest Common Factors (GCF)Nope, I got it.

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Get Started Now- Intro Lesson: a5:06
- Lesson: 1a1:24
- Lesson: 1b2:26
- Lesson: 1c2:28
- Lesson: 1d3:05
- Lesson: 2a1:32
- Lesson: 2b1:23
- Lesson: 2c1:32
- Lesson: 3a3:48
- Lesson: 3b1:40
- Lesson: 3c3:41

Like GCF, you will also need to do prime factorization to find the Least Common Multiple (LCM) of numbers. After finding out all the prime factors of each number, we then need to multiply each prime factor the greatest number of times it happens in any numbers. In this lesson, we are going to use the "cake method" to solve the questions.

Basic concepts: Greatest Common Factors (GCF),

• __Least Common Multiple LCM__: The smallest common non-zero multiple of 2 or more whole numbers.

• For the Ladder Method, we can divide all the given numbers by a number.

- Introductiona)How to find the least common multiple (LCM)?
- 1.
**Using Prime Factorization to Find the Least Common Multiple (LCM)**Find the least common multiple (LCM) using prime factorization:

a)5, 14b)20, 24, 48c)10, 24d)18, 30, 45 - 2.
**Using the “Listing Multiples” Method to Find the Least Common Multiple (LCM)**Find the least common multiple (LCM) using the “Listing Multiples” method:

a)7, 28b)12, 16c)18, 30, 45 - 3.
**Using the Ladder Method to Find the Least Common Multiple (LCM)**Find the least common multiple (LCM) using the Ladder Method:

a)24, 30b)12, 17c)18, 30, 45

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