Math Identify Numbers to 20

Which of the following statements describe all prime numbers?

• All prime numbers are even.

• All prime numbers have more than two factors.

• All prime numbers have exactly two factors.

• All prime numbers have a factor of 1.

Find the mean.

18, 2, 0, 0, 0

• 4

• 5

• 10

• 20

The median is the __________________ number (after you put them in order).

• first

• middle

• last

• one you see most

What is the mode in this set of numbers:
7, 14, 20, 3, 7, 14, 2, 14, 7

• 7

• 20

• 7 & 14

• none of the above

Find the range.
12, 5, 9, 18, 22, 25, 5

• 20

• 15

• 22

• 18

To find the ________ you put all numbers in order from least to greatest and find the number that is in the middle.

• Mean

• Median

• Mode

• Range

Sophie is trying to identify an unknown number. She knows the following properties of the unknown number:

• The opposite of the unknown number is 20
• The absolute value of the unknown number is 20

What is the unknown number Janet is trying to identify?

• 1/20

• -20

• -1/20

• 20