Prime and Composite Odd Even

Which of the following sets of numbers contain only prime numbers?

• 9, 17, 31, 37

• 5, 21, 41, 43

• 2, 23, 43, 47

• 2, 6, 23, 47

Bob was asked to write the first 10 prime numbers. Which set shows the first ten prime numbers?

• 2, 3, 5, 7, 11, 13, 17, 19, 23, 29

• 2, 3, 5, 7, 9, 11, 13, 17, 19, 23

• 1, 2, 3, 5, 7, 11, 13, 17, 19, 23

• 3, 5, 7, 9, 11, 13, 15, 17, 19, 21

A number is even if it is divisible by which number?

• 1

• 5

• 0

• 2

Choose all of the even numbers. You must select ALL correct answers!!

• 542

• 396

• 683

• 4,001

• 276

Is the difference between 17,480 and 13,399 odd or even?

• odd

• even

Which is the definition of an even number?

• A number that can not be divided by 2

• A number that ends in 1, 3, 5, 7, and 9

• A number that can be divided by 2

• A number that when split into two equal groups will have one remaining

What are always the factors of a prime number?

• 1, 2, and the number itself

• 1 and the number itself

• Every number from 1-10

• 0 and 1

Composite numbers:

• Are always bigger than prime numbers

• Have more than 2 factors

• Only have 2 factors

• Don't have factors

Find the prime number

• 20

• 13

• 21

• 6

What number is the only even prime number?

• 0

• 2

• 1

• 3