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Cross Multiplication Practice

Quiz by Danelle Castle

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10 questions
Show answers
  • Q1
    Find the cross products of 6/16 = 9/24
    9(24) = 6(16)
    16(24) = 9(6)
    6(24) = 9(16)
    144
    120s
  • Q2
    Find the cross products for 21/49 = 3/7
    3(21)=7(49)
    147
    3(49) = 7(21)
    3(7)=21(49)
    120s
  • Q3
    Is 2/10 = 4/16 a proportion?
    no
    yes
    120s
  • Q4
    Is 12/7 = 34/20 a proportion?
    no
    yes
    120s
  • Q5
    Is 20/18 = 30/27 a proportion?
    yes
    no
    120s
  • Q6
    Solve. k/8 = 14/4
    k = 28
    k = 18
    k = 2
    k = 2.286
    120s
  • Q7
    Solve. u/3 = 10/5
    u = 1.5
    u = 6
    u = 5
    u = 1
    120s
  • Q8
    Solve. 36/32 = n/8
    n = 9
    n = 11
    n = 10
    n = 8
    120s
  • Q9
    In 1991, the income for a typical 8-acre cotton farm was $3040. Estimate the income for a 13-acre cotton farm.
    $4,940
    $1,870.77
    $380
    $5,000
    120s
  • Q10
    A 150-pound person contains about 97.5 pounds of the element oxygen. Estimate the amount of oxygen in a 216-pound person.
    70
    67.7
    140.4
    150
    120s

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