Download Multiples, Factors, Prime and Composite

Math Test Review – Multiples, factors, prime and composites
Do first question and create 2 more similar questions
1. List the first 10 multiples of each number and identify the Lowest
Common Multiple
a) 5: _______________________________________
7: _______________________________________
b)
____________________________________________________________
________________________________________________
c)
____________________________________________________________
________________________________________________
2. Identify all the factors for each number
a) 24 (1, 2, 3, 4, 6, 8, 12, 24)
b)
c)
3. Identify each number as being prime or composite.
A prime number has only two factors (one and itself).
A composite number has 3 or more factors.
a) 17 – Prime
b) 20 – Composite
c)
d)
4. Create a factor tree or repeated division for the following numbers
I can’t really show how to do a factor tree on the computer properly show
please check the website (Nelson Math) for examples.
a)
20
4 -5
or
20
2 – 10
2–2
5-2
b)
c)
5. Write each number as a product of prime numbers.
a) 27 = 3 x 3 x 3 (You would do a factor tree or repeated division to find
the answer to this question.)
b)
c)
6. Problem Solving: Remember to use the steps for problem solving.
Steps for Problem Solving
1. Read or write problem.
2. List facts:
3. Question: Write the question in your own words to demonstrate you
UNDERSTAND the problem.
4. Strategy: Make a plan
5. Solve: Do the work.
6. Estimate: Check you work by making sure you are on the right track.
a. If Declan has a basketball practice every second day and Cheyenne has a
dance practice every 3rd day. What day to they have a practice on the same
day?
b) Jason is baking cookies and he would like to think about all the different
arrays he can make with the cookies. He has 20 cookies. How many
different arrays can he make?