Understanding Basic Arithmetic and Factors

The video tutorial covers the concept of prime factorization, explaining how to determine the prime factorization of a number, specifically 140, using only prime numbers. The teacher discusses the properties of prime numbers and evaluates different answer choices to identify the correct prime factorization. The lesson concludes with a verification of the correct answer through multiplication, ensuring it equals 140.

What is the main topic discussed in the video?

• Addition and Subtraction

• Geometry

• Fractions

• Prime Factorization

What is a prime number?

• A number with more than two factors

• A number that can be divided by 1 and itself only

• A number that is even

• A number that is odd

Which of the following is a prime number?

• 9

• 4

• 6

• 7

What is the first step in checking if a number is prime?

• Multiply it by 2

• Check if it can be divided by any number other than 1 and itself

• Add 1 to it

• Subtract 1 from it

Why is answer choice A incorrect?

• It contains an even number

• It contains a negative number

• It contains a composite number

• It contains a decimal

Which numbers are in answer choice B?

• 3, 5, 7

• 2, 5, 7

• 2, 4, 6

• 1, 5, 9

Why is answer choice B considered correct?

• It contains only even numbers

• It contains only odd numbers

• It contains only composite numbers

• It contains only prime numbers

What makes 35 a composite number?

• It is a decimal

• It is an even number

• It can be divided by 5 and 7

• It is a prime number

Why is answer choice C incorrect?

• It contains a composite number

• It contains a negative number

• It contains an even number

• It contains a decimal

What is the factorization of 10?

• 4 x 2

• 3 x 3

• 2 x 5

• 1 x 10