Prime Time Unit Review

Find the prime factorization of 27.

• 9x3
• 2x3x3
• 3x3x3
• 3+3+3

Find the prime factorization of 120.

• 2x2x3x5
• 2x60
• 2x3x5
• 2x2x2x3x5

• A
• B
• C
• D

Tags

CCSS.6.EE.A.1

A number is less than 85. The number has 26 and 6 as factors. Find the number.

• 78
• 156
• 75
• 84

Tags

CCSS.4.OA.B.4

Sam and Martha are the local names for two lighthouses on the coast. Sam blinks every 24 seconds and Martha blinks every 16 seconds. How many seconds will pass before they blink together again?

• 8 seconds
• 48 seconds
• 64 seconds
• 384 seconds

Tags

CCSS.6.NS.B.4

Mrs. Billings is packing snack sacks for a field trip. Every sack has exactly the same snacks in it. Mrs. Billings has 120 granola bars and 90 small popcorn balls. What is the greatest number of snack sacks she can make? How many of each kind of snack is in one sack?

• 30 snack sacks: 3 granola bars, 4 popcorn balls
• 2 snack sacks: 60 granola bars, 45 popcorn balls
• 30 snack sacks: 4 granola bars, 3 popcorn balls
• 3 snack sacks: 40 grandola bars, 30 popcorn balls

Tags

CCSS.6.NS.B.4

CCSS.6.RP.A.1

CCSS.6.RP.A.3

What is the greatest common factor of 60 and 42?

• 6
• 420
• 3
• 1

Tags

CCSS.6.NS.B.4

What is the least common multiple of 60 and 42?

• 2,520
• 6
• 420
• 840

Tags

CCSS.6.NS.B.4

Dawson wrote the factorization 3^2 x 5^2. Without solving, how can Dawson tell if the number is even or odd?

• 3 is odd and 5 is odd...Therefore the answer will be odd.
• 3 is odd and 5 is odd...Therefore the answer will be even. 

Tags

CCSS.3.OA.D.9

• 156
• 75
• 12
• 30

Tags

CCSS.7.EE.B.3