Exploring Factors and Multiples for ACT Math Success

The video tutorial covers the concepts of factors and multiples, essential for the ACT math test. It begins with definitions and examples of factors, including prime numbers and the greatest common factor. The tutorial then explains multiples, providing examples and a problem-solving approach to finding the least common multiple. The video emphasizes understanding these concepts through examples and practice problems.

What are the factors of 12?

• 1, 2, 3, 4, 6, 12

• 1, 2, 4, 6, 8, 12

• 1, 3, 4, 6, 9, 12

• 1, 2, 3, 5, 6, 12

Tags

CCSS.4.OA.B.4

Which of the following numbers is considered prime?

• 12

• 15

• 17

• 20

Tags

CCSS.4.OA.B.4

What is the greatest common factor (GCF) of 2 times 3 to the 4th and 3 cubed?

• 27

• 3

• 162

• 6

Why can't the greatest common factor be larger than either of the numbers?

• Because it must divide both numbers evenly

• Because it must be a prime number

• Because it must be an even number

• Because it must be a multiple of both numbers

What is a multiple of 3?

• 11

• 2

• 5

• 9

Tags

CCSS.4.OA.B.4

Which of the following is NOT a multiple of 3?

• 14

• 12

• 9

• 6

Tags

CCSS.4.OA.B.4

What is the least common multiple (LCM) of 12, 20, and 40?

• 60

• 80

• 120

• 160

Why is 60 not the least common multiple of 12, 20, and 40?

• Because 60 is not divisible by 12

• Because 60 is not divisible by 40

• Because 60 is not divisible by 12, 20, and 40

• Because 60 is not divisible by 20

What is the result of 120 divided by 12?

• 8

• 10

• 12

• 14

Tags

CCSS.5.NBT.B.6

CCSS.6.NS.B.2

What should you do to stay a champion in the ACT math test?

• Study only the night before

• Ignore practice problems

• Take advantage of all practice problems

• Skip difficult questions