Please help me on math, thanks!

If no digit may be used more than once, how many 2-digit numbers can be formed using only the digits 5, 6, 3, and 2?

11
12
10
2

  1. 0
  2. 0
  3. 3
asked by Frank
  1. 56
    53
    52
    65
    35
    25
    63
    62
    36
    26
    23
    32

    Did I list all of the possibilities?

    1. 0
    2. 0
    posted by Ms. Sue
  2. There are 4 digits to fill 2 spaces
    number = (4)(3) = 12

    1. 0
    2. 0
    posted by Reiny

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