Prime Composite Even Odd

Which group of numbers contains only composite numbers?

• 1, 9, 12, and 28

• 6, 15, 21, and 36

• 2, 8, 22, and 40

• 6, 14, 17, and 39

3, 5, 7, and 11 are prime because:

• they are odd numbers.

• they have exactly two factors.

• they cannot be divided by 2.

• they have more than two factors.

Identify all the prime numbers.

• 27

• 43

• 53

• 59

• 87

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

Which best describes an odd number?

• A number that cannot be grouped in twos.

• A number based on groupings of 10.

• A number that represents part of a whole.

• A number that can be divided by 2 with 0 remaining.

Which set contains only odd numbers?

• 72, 74, 76, 78, 80

• 63, 65, 67, 69, 71

• 54, 56, 58, 60, 62

• 66, 68, 70, 72, 74

Bob had $300. For his birthday, his parents gave him $30 more. On Saturday, he and two of his friends went to the mall. Bob bought a shirt for $34. Did Bob have an even or odd amount of money left over?

• even

• odd

If E represents an even number and O represents an odd number, which statements are always true? You must select ALL correct answers!!

• E + E = E

• E + E = O

• O + O = E

• O + O = O

Fill in the blanks:

1. The product of two even numbers is ______________.
2. The product of two odd numbers is ______________.

• even, odd

• odd, even

• even, even

• odd, odd

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

• odd

• even