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

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

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

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

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

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

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

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

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

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: ________

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: _______________