Prime Numbers and Factors

Which number is a factor of 23?

• 8

• 4

• 3

• 1

Which are factors of 20?

• 2,10,5,4,1,20

• 3,5,7,9

• 40,80,100

• 15,25,35

Which numbers are prime?

• 1

• 2

• 11

• 15

• 21

Which list has only prime numbers?

• 2, 3, 4, 5

• 1, 5, 7, 9

• 2, 3, 5, 7

• 2, 4, 6, 8

What are the factors of 15?

• 1, 2, 3, 5, 15

• 1, 3, 5, 15

• 1, 2, 3, 4, 5

• 1, 5, 10, 15

Finding the unique set of prime numbers that multiply up to composite numbers

• Prime Factorization

• Multiplication

• Division

• Factoring

A whole number divides exactly into another number

• Multiple

• Quotient

• Product

• Factor

Which number is a factor of 18

• 4

• 7

• 6

• 12

What are all prime numbers divisible by?

• 1, 2, and itself

• 1 and itself

• Every number from 1-10

• They aren't divisable at all

The product of a numbers prime factors; factoring by using the prime factors nested in a given number.

• Prime Numbers

• Prime Factorization

• Greatest Common Factor

• Least Common Factor