Math Final Summative Preparation

The factors of 20 are ....

• 1, 2, 4, 5, 10, 20

• 1, 2, 4, 5, 15, 20

• 1, 2, 4, 6, 15, 20

• 1, 2, 3, 6, 15, 20

360 if expressed as a product of prime factors is....

• 2² × 3³ × 5

• 2³ × 3² × 5

• 2³ × 3³ × 5

• 2⁴ × 3³ × 5

The highest common factor of 24 and 18 is....

• 12

• 6

• 4

• 3

The lowest common multiple of 18 and 12 is....

• 24

• 27

• 36

• 54

The light on a service vehicle flashes every 20 seconds. The light on a tractor flashes every 10 seconds. As they pass each other on a road, the lights flash together. How many seconds will it be before this happens again?

• 5 seconds

• 10 seconds

• 15 seconds

• 20 seconds

Mr. Smith has 150 stickers and 45 notebooks to distribute among his students. What is the maximum number of students he can have in his class so that each student receives the same number of stickers and the same number of notebooks?

• 50 students

• 45 students

• 30 students

• 15 students

Answer explanation

To find the maximum number of students, we need to determine the greatest common divisor (GCD) of 150 stickers and 45 notebooks. The GCD is 45, meaning Mr. Smith can have a maximum of 45 students, each receiving 3 stickers and 1 notebook.

• 0.125 and 2.500

• 0.225 and 2.250

• 0.350 and 0.250

• 0.375 and 0.225

Arrange the following numbers in ascending order.

• 7/12, 62.5%, 0.66, 3/4

• 0.66, 7/12, 62.5%, 3/4

• 62.5%, 3/4, 7/12, 0.66

• 7/12, 0.66, 62.5%, 3/4

The value of 10% of 150 is ....

• 10

• 12

• 15

• 18

The value of Frank’s house has gone up by 20% in the last year. If the house was worth $150,000 one year ago, how much is it worth now?

• $230,000

• $200,000

• $180,000

• $170,000