Prime Factorization and Prime Numbers

The video tutorial explains the concept of prime factorization, which involves finding prime numbers that multiply together to form the original number. It demonstrates the prime factorization of the numbers 9 and 21. For 9, the prime factors are 3 and 3, which can be expressed as 3 squared. For 21, the prime factors are 3 and 7. The video concludes with a reminder to subscribe to the channel for daily math and science videos.

What is the prime factorization of 9?

• 2 times 4.5

• 1 times 9

• 3 times 3

• 9 times 1

Which of the following is a prime number used in the factorization of 9?

• 4

• 9

• 3

• 6

What is the prime factorization of 21?

• 1 times 21

• 2 times 10.5

• 3 times 7

• 7 times 3

Which of the following numbers is not a prime factor of 21?

• 1

• 21

• 7

• 3

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