Understanding Prime Numbers and Factors

The video tutorial covers prime numbers, composite numbers, and prime factorization. It explains how to identify prime numbers and use factor trees to break down composite numbers into their prime factors. The tutorial also introduces solving algebraic equations using prime factors and the seesaw method. Practice problems are provided to reinforce the concepts.

What is the smallest prime number?

• 3

• 1

• 2

• 5

Which of the following is NOT a prime number?

• 5

• 4

• 3

• 2

What is a composite number?

• A number that is even

• A number with more than two factors

• A number divisible only by 1 and itself

• A number that is odd

Which of the following numbers is a prime factor of 42?

• 2

• 8

• 4

• 6

What is the prime factorization of 80?

• 2^4 x 5

• 2^3 x 10

• 4 x 20

• 8 x 10

Which of the following is a prime factor of 147?

• 8

• 6

• 5

• 3

What is the sum of the digits of 147?

• 10

• 11

• 13

• 12

What is the result of dividing 147 by 3?

• 47

• 49

• 53

• 51

What does the term 'twice a number' mean in algebraic equations?

• The number plus two

• The number divided by two

• The number minus two

• The number multiplied by two

In the equation 2x + 17 = 55, what is the value of x?

• 17

• 19

• 21

• 23