Common Factors, HCF, and LCM Concepts

The video tutorial introduces the concepts of Highest Common Factor (HCF) and Lowest Common Multiple (LCM). It explains how to find the HCF by identifying common factors of two numbers and selecting the highest one. The tutorial also covers the calculation of LCM by finding common multiples and selecting the lowest one. An alternative method for finding LCM using prime factorization is demonstrated. The video concludes with a summary and a preview of the next video, which will provide further examples.

What does HCF stand for?

• Highest Common Factor

• Highest Common Fraction

• Highest Common Function

• Highest Common Formula

Which of the following is another name for HCF?

• Greatest Common Denominator

• Greatest Common Divisor

• Greatest Common Difference

• Greatest Common Dividend

What are the common factors of 20 and 24?

• 1, 2, 3

• 1, 2, 4

• 2, 4, 5

• 1, 3, 5

What is the HCF of 20 and 24?

• 5

• 2

• 3

• 4

What is the prime factorization of 20?

• 3 x 3 x 5

• 2 x 2 x 5

• 2 x 2 x 3

• 2 x 3 x 5

What is the prime factorization of 24?

• 2 x 3 x 3

• 2 x 2 x 2 x 3

• 2 x 2 x 3

• 3 x 3 x 3

What does LCM stand for?

• Lowest Common Multiple

• Lowest Common Measure

• Lowest Common Median

• Lowest Common Mean

What are the multiples of 6?

• 6, 12, 18, 24

• 6, 13, 19, 25

• 6, 14, 20, 26

• 6, 15, 21, 27

What are the multiples of 8?

• 8, 17, 25, 33

• 8, 18, 26, 34

• 8, 19, 27, 35

• 8, 16, 24, 32

What is the LCM of 6 and 8?

• 30

• 18

• 24

• 36