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Unit 1 Review
Factors and Multiples
Read each question and choose the best answer.
What is a factor?
A number that you multiply with another number to get to a product.
A number that you land on when you count by a specific number.
Correct!
True of False? 32 is a multiple of 8?
Let’s Try Again….
A factor is a number that you multiply with another number to
get to a product. For example, 3 and 4 are two factors of
12…3x4=12
Is 6 a factor of 25?
Yes
No
Right Again!
Keep up the Good Work!
Which choice shows ALL the factors of 42?
2, 6, 7, 21
42, 84, 126, 168
1, 2, 3, 6, 7, 14, 21, 42
Think of it this way….
32 is a multiple of 8. If you count by 8, you will land on 32. That proves
that 32 is a multiple of 8. 8, 16, 24, 32, 40.
Which number is a factor of 24?
6
7
Sorry, let’s think about this…
Remember, a factor is number that you multiply by another to number to reach a
product. With this problem 25 is the product, so can you multiply 6 with another
number to get to 25?
6x1=6 This shows that 6 is NOT a factor of 25.
6x2=12
6x3=18 Is 7 a factor of 35?
6x4=24
6x5=30
Correct!
True or False…54 is a multiple of 6.
You are on a roll!
What number fits all of these clues?
1. This number is a square number.
2. This number if a multiple of 3.
3. This number is greater than 50.
Factors of a number
All numbers have at least 2 factors, they are 1 and themselves. All factors
are lower than the number they make. 1, 2, 3, 4, 6, 12. Are ALL the
factors of 12.
Which number is NOT a factor of 63?
You seem to be getting stuck. Take your time and use your scrap
paper to help you answer this question.
Is 64 a multiple of 4 or 8? Remember a multiples of a number is a
number you land on when counting by that number.
Lets Try Again
What is a square number?
A number that
only has 2
factors.
A number that
has the same
factor
multiplied by
itself to reach
the product.
Square Vs. Prime
A square number is a number that has the
same factor multiplied by itself to reach the
product.
A prime number is a number that only has
two factors. 1 and itself.
Continue
Factors of 64
Both 8 and 4 are factors of 64. Therefore, 64 is a multiple of both 8 and 4.
If you count by either of these numbers you will land on 64.
4,8,12,16,20,24,28,32,36,40,44,48,52,56,60,64
8,16,24,32,40,48,56,64
Try
Again
~ You Did Well ~
Click on the picture below for additional multiplication practice.
You may play this game two times before returning to your seat.
Good Luck!