1. Factors, Multiples, and Arrays Cumulative Review
Montclair 4th grade

2. Problem #1
Which factor 35 is represented on this array? Hint: You are just looking for one factor. However, it’s a good habit to label the array with both factors.
A. 5
B. 6
C. 9
D. 13

3. Problem #2
35 is a multiple of which number? Hint: Ask yourself, “Which one of these numbers can I skip count by and hit 35?” Your answer will actually be a factor of 35.  70 7 17
350

4. Problem #3
Which 2 numbers have 6 as their greatest common factor? Hint: Try each pair until you find 6 as the GCF. Use the “big F” or factor tree.
18 and 24
12 and 24
20 and 25
21 and 63

5. Problem #4
Which of the following pairs of numbers have a least common multiple of 36? Hint: Try each pair, use the “multiple mountain.”
9 and 18
6 and 4
18 and 12
10 and 20

6. Problem #5
The table shows prices of items at a sporting goods store. How much would it cost to buy 4 tents balls and 3 fishing poles? Remember: Complete all parts of the problem. There is more than one step.
A. $49
B. $136
C. $ 45
D. $181
Items
Price
Tent
$ 34
Fishing pole
$ 15

7. Problem #6
Each of the 6 school buses at Montclair Elementary seats 54 students. How many students can be transported at any one time by all the buses? Remember: Use a multiplication strategy that you have learned or repeated addition. A. 60 students B. 324 students C. 343 students D. 304 students

8. Problem #7
For which of the following is 100 the best estimate for the product? Hint: Round each 2 digit number to the nearest 10, then multiply or use repeated addition.
55 X 3
23 X 6
24 X 5
39 X 2

9. Problem #8
Jonas made 8 model cars and 5 model jets. He used 4 wheels to make each car and 3 wheels to make each jet. How many wheels did he use in all? Remember: Show all parts of the problem. There is more than one step. Drawing a picture may be helpful also. 20 47 85 43

10. Problem #9
Which is the greatest common factor of 14 and 28? Remember: Show all of your work, and list all the factors first. GCF: ________

11. Problem # 10
Find all of the factors of 16 and 24 and place them correctly on the Venn Diagram. Remember: Only the unlike factors go in the outside portion of the Venn Diagram. Like factors go in the center. 16: _______________ 24: _______________