Understanding Factors and Prime Numbers

What is a whole number?

• A number with fractions

• A number with decimals

• A number without fractions or decimals

• A number less than zero

Which of the following is a prime number?

• 4

• 9

• 15

• 13

What is a composite number?

• A number with more than two factors

• A number that is less than one

• A number with exactly two factors

• A number with only one factor

What are the prime factors of 20?

• 4 and 5

• 2 and 5

• 2 and 10

• 1 and 20

Why is the number 1 not considered a prime number?

• It has more than two factors

• It is a composite number

• It has no factors

• It has only one factor

What is the first step in creating a factor tree for the number 36?

• Divide 36 by 36

• List all factors of 36

• Find two numbers that multiply to 36

• Divide 36 by 1

Which of the following is a correct pair of factors for 36?

• 6 and 6

• 3 and 12

• All of the above

• 2 and 18

What does the divisibility rule for 2 state?

• A number is divisible by 2 if it is odd

• A number is divisible by 2 if it ends in 0, 2, 4, 6, or 8

• A number is divisible by 2 if it is a prime number

• A number is divisible by 2 if it is greater than 10

How can you determine if a number is divisible by another number without a remainder?

• By adding the digits of the number

• By checking if the number is even

• By dividing the number and checking for no remainder

• By multiplying the number by 2

What is the result of 2 * 2 * 3 * 3?

• 18

• 24

• 36

• 48