Prime Time Unit Review

The least common multiple of 4 and 9 is _

(a)  

The least common multiple 4 and 8 is _

(a)  

The greatest common factor of 24 and 28 is _

(a)  

The greatest common factor of 15 and 22 is _

(a)  

The prime factorization of 32 is _

(a)  

Draw and label all of the different rectangular arrays that can be made with 15 tiles.

There are two squirrels. Lucy comes down the tree every 3 minutes. Frank comes down his tree every 8 minutes. They both came down the tree at noon. How many minutes until they come down their trees together again? _

(a)  

Mrs. Barnes is packing school supplies for her class. She has 35 pencils and 42 erasers. Each student receives the same number of pencils and erasers and no supplies are left over. What is the greatest number of students in the class? _

(a)  

Simplify the expression: $$15+3\cdot6$$  

(a)  

Simplify the expression: $$45-6\div3+6\cdot2$$  

(a)