1.   Identify the solution of 84 ÷ r = 12.
    A. 72 B. 21
    C. 6 D. 7
    Hint

  2.   The Pacific giant kelp plant is one of the fastest-growing plants in the world. The table below shows the growth of one plant. Predict what the height of the plant will be in week 10.
   
    A. 14 ft B. 12 ft
    C. 20 ft D. 10 ft
    Hint

  3.   A cave in the Ukraine is 131.73 miles long. The Mammoth Cave system in Kentucky is 2.695 times the length of the Ukraine cave. Approximately how long is the Mammoth Cave system?
    A. 355 mi B. 35,501 mi
    C. 3,550 mi D. 36 mi
    Hint

  4.   Find the prime factorization of 126.
    A. 2 × 3 × 3 B. 2 × 2 × 3 × 3 × 7
    C. 2 × 3 × 7 D. 2 × 3 × 3 × 7
    Hint

  5.   Write in simplest form.
    A. B.
    C. D.
    Hint

  6.   Choose the multiples of 20.
    A. 1, 2, 4, 5, 10, 20, … B. 2, 2, 5
    C. 0, 20, 40, 60, 80, … D. 10, 20, 30, 40, …
    Hint

  7.   Estimate
    A. 3 B. 2
    C. D.
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  8.   In Mrs. Freeman's class, of the students are girls. What fraction of the class is boys?
    A. B.
    C. D.
    Hint

  9.   Find the sum of and .
    A. B.
    C. D.
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  10.   What is the area of the top of a cubic ice cube with sides of length 2 cm?
    A. 2 cm2 B. 8 cm2
    C. 16 cm2 D. 4 cm2
    Hint

  11.   Find 4 × 0.0034.
    A. 1.36 B. 0.0126
    C. 0.1216 D. 0.0136
    Hint

  12.   Find 78 + 55.
    A. 143 B. 123
    C. 133 D. 23
    Hint

  13.   Find 156 ÷ 12.
    A. 13 B. 144
    C. 1,872 D. 168
    Hint

  14.   Find 12 + 48 ÷ 6.
    A. 10 B. 66
    C. 20 D. 54
    Hint

  15.   Estimate 3.6 + 2.3.
    A. about 8 B. about 1
    C. about 5 D. about 6
    Hint

  16.   Find 232 ÷ 4.
    A. 236 B. 580
    C. 58 D. 228
    Hint

  17.   Graph −16 on a number line.
    A.
    B.
    C.
    D.
    Hint

  18.   Round 15 to the nearest ten.
    A. 16 B. 20
    C. 15 D. 10
    Hint

  19.   Round 216 to the nearest ten.
    A. 200 B. 215
    C. 210 D. 220
    Hint

  20.   Choose the least number.
    A. 0.152 B. 2.51
    C. 0.523 D. 0.241
    Hint