Integers, Factors, Multiples, Rational Numbers

A prime number is...

• a number that has only one factor.
• a number that has at least two factors.
• a number that has more than two factors.
• a number that has exactly two factors, 1 and itself.

Which of the following expressions shows 12 as a product of its prime factors? 

• 2 x 6
• 2 + 2 + 2 + 2 + 2 + 2 
• 2 x 2 x 3
• 1 x 2 x 2 x 3

51 is a _____________ of 3

• Factor 
• Multiple

What is the Least Common Multiple (LCM) of 4 and 10?

• 4
• 40
• 2
• 20

What is the Greatest Common Factor (GCF) of 18 and 24?

• 3
• 6
• 36
• 72

Sara had 16 red flowers and 24 yellow flowers.  She wants to use all the flowers to make bouquets with the same number of each color flower in each bouquet. What is the greatest number of bouquets that she can make?

• 4
• 16
• 48
• 8

The school cafeteria serves tacos every sixth day and cheeseburgers every eighth day. If tacos and cheeseburgers are both on today’s menu, how many days will it be before they are both on the menu again?

• 14 days
• 24 days
• 34 days
• 44 days

List the first 5 multiples of 3

• 3, 6 10, 15, 20
• 1, 3
• 3, 6, 9, 12, 15
• 6, 9, 12, 15, 18

Which number is a factor of 18

• 4
• 7
• 6
• 12

Which number is not a factor of 24?

• 6
• 8
• 3
• 14