1st Quarter Benchmark Review Quizizz

Find the GCF of 14 and 18

• 6

• 7

• 9

• 2

Answer explanation

To find the GCF of 14 and 18, we list their factors: 14 (1, 2, 7, 14) and 18 (1, 2, 3, 6, 9, 18). The common factors are 1 and 2. The greatest of these is 2, making it the GCF.

Determine the GCF of 45 and 60

• 5

• 10

• 15

• 20

Answer explanation

To find the GCF of 45 and 60, we list their factors: 45 (1, 3, 5, 9, 15, 45) and 60 (1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60). The greatest common factor is 15.

LCM(3, 8) =

• 16

• 24

• 32

• 48

Answer explanation

To find the LCM of 3 and 8, we list the multiples: 3 (3, 6, 9, 12, 15, 18, 21, 24...) and 8 (8, 16, 24, 32...). The smallest common multiple is 24, making the correct answer 24.

Tags

CCSS.6.NS.B.4

LCM(12, 8)

• 96

• 24

• 36

• 72

Answer explanation

To find the LCM of 12 and 8, we can use the prime factorization method. The prime factors of 12 are 2^2 and 3, and for 8, it's 2^3. The LCM is found by taking the highest power of each prime: 2^3 and 3^1, which gives us 24.

Tags

CCSS.6.NS.B.4

What is 17% of 98?

• 20.00

• 15.34

• 18.12

• 16.66

Answer explanation

To find 17% of 98, multiply 98 by 0.17: 98 * 0.17 = 16.66. Therefore, the correct answer is 16.66.

Tags

CCSS.6.RP.A.3C

What is 25% of 64?

• 12

• 16

• 18

• 20

Answer explanation

To find 25% of 64, multiply 64 by 0.25. This gives 64 * 0.25 = 16. Therefore, the correct answer is 16.

Tags

CCSS.6.RP.A.3C

Round to the nearest hundredths place: 9.064

• 9.06

• 9.10

• 9.00

• 9.07

Answer explanation

To round 9.064 to the nearest hundredths place, look at the third decimal (4). Since 4 is less than 5, we round down, resulting in 9.06. Thus, the correct answer is 9.06.

Tags

CCSS.5.NBT.A.4

Antonio biked 54 miles in 4 hours, 30 minutes. What is his average speed in MPH

• 10 MPH

• 8 MPH

• 12 MPH

• 15 MPH

Answer explanation

To find the average speed, divide the total distance by the total time. Antonio biked 54 miles in 4.5 hours. Average speed = 54 miles / 4.5 hours = 12 MPH. Thus, the correct answer is 12 MPH.

Tags

CCSS.6.NS.B.3

Quinn has 14 dogs and 8 cats. Which ratio represents the number of dogs to the total number of pets IN SIMPLEST FORM?

• 7:11

• 8:14

• 14:22

• 7:6

Answer explanation

Quinn has 14 dogs and 8 cats, totaling 22 pets. The ratio of dogs to total pets is 14:22. Simplifying this by dividing both numbers by 2 gives 7:11, which is the simplest form. Thus, the correct answer is 7:11.

Tags

CCSS.6.RP.A.1

CCSS.6.RP.A.2

18 is what percent of 90?

• 25%

• 20%

• 15%

• 30%

Answer explanation

To find what percent 18 is of 90, use the formula (part/whole) x 100. So, (18/90) x 100 = 20%. Therefore, 18 is 20% of 90.