Prime Factorization and Factors

The video tutorial explains the concept of prime factorization using the numbers 225 and 43. It begins with the factorization of 225, demonstrating the use of a factor tree to break it down into its prime components: 3 squared times 5 squared. The tutorial then briefly discusses the prime nature of 43 and instead factors 42 into 2 times 3 times 7. The video concludes with a call to action for viewers to subscribe to the channel for more math and science content.

What is the first step in the prime factorization of 225?

• Subtract 5

• Divide by 3

• Multiply by 10

• Divide by 2

Which of the following is a prime factor of 225?

• 4

• 6

• 5

• 10

What is the prime factorization of 225?

• 3 x 5 x 7

• 2 x 2 x 5 x 5

• 2 x 3 x 5

• 3 x 3 x 5 x 5

Why is 43 considered a prime number?

• It is even

• It has no divisors other than 1 and itself

• It is less than 50

• It is a multiple of 5

What is the prime factorization of 42?

• 5 x 7

• 2 x 3 x 7

• 3 x 3 x 5

• 2 x 2 x 11

Which of the following numbers is a factor of 42?

• 11

• 8

• 9

• 7