1.   Choose a tens digit for 2?6 so that the three-digit number is divisible by 6.
    A. 1 B. 0
    C. 2 D. 3
    Hint

  2.   Solve x = 34.
    A. x = 81 B. x = 64
    C. x = 12 D. x = 27
    Hint

  3.   Factor 144 completely.
    A. 3 · 3 · 4 · 4 B. 4 · 4 · 9
    C. 12 · 12 D. 2 · 2 · 2 · 2 · 3 · 3
    Hint

  4.   Find the greatest common factor of 168 and 288.
    A. 36 B. 2
    C. 48 D. 24
    Hint

  5.   Find the greatest common factor of 64ab3c2 and 48a2b2c.
    A. 8a2b2c2 B. 8ab3c
    C. 16ab2c D. 16abc
    Hint

  6.   Simplify
    A. B.
    C. D.
    Hint

  7.   Simplify
    A. B.
    C. D. 2ab2
    Hint

  8.   Express 7-3 using positive exponents.
    A. B.
    C. D. (-7)3
    Hint

  9.   Write 0.478 in scientific notation.
    A. 4.78 × 10-1
    B. 4.78 × 10-2
    C. 478 × 101
    D. 4.78 × 102
    Hint

  10.   The diameter of a volcanic particle averaged 0.000022 meter. What is this measure written in scientific notation?
    A. 2.2 × 10-5
    B. 2.2 × 10
    C. 2.2 × 105
    D. 0.22 × 10-4
    Hint

  11.   The number 462 is divisible by which of the following?
    A. 10 B. 6
    C. 5 D. None of these
    Hint

  12.   Write 3 · x · x · x · x · y · y · y · y using exponents.
    A. 3>x4y3 B. 3xy8
    C. 34x4y4 D. 3x4y4
    Hint

  13.   Write the prime factorization of 500.
    A. 24 · 52 B. 23 · 52
    C. 22 · 53 D. 5 · 102
    Hint

  14.   Which fraction is written in simplest form?
    A. x2yz B. Already simplified
    C. D.
    Hint

  15.   Find 63 · 62.
    A. 66 B. 365
    C. 65 D. 366
    Hint

  16.   Write the expression 5-4 using a positive exponent.
    A. 54 B.
    C. -54 D.
    Hint



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