math

posted by .

How many different four-digit number combinations are possible from the numbers 0-9?

  • math -

    number of different 4 digit number
    = 9x10x10x10 = 9000

    (we cannot start with a zero, thus only 9 choices for the lead number)

  • math -

    In my answer, I assumed that you can repeat a number

    If each can be used only once, then
    number of ways = 9x9x8x7 or 4536

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. Math

    How many different three-digit numbers can be written using the digits 4, 5, 6, and 7?
  2. COMBINATION!!MATH!!!hurryyy!!!

    Cards are drawn at random from a 52-card deck. Find the number of different 5-card poker hands possible consisting of 3 aces and 2 kings?
  3. Math (Reiny)

    Regarding my question below, when the question talks about digits 0-7 do we include the 0. In other words, are the possible digits 0,1,2,3,4,5,6,7 or 1,2,3,4,5,6,7?
  4. Math. Explain

    From the digits 1, 2, 3, and 4, how many positive integers are less than 100,000?
  5. math

    A four-digit number between 12 and 13 has an odd number in the hundredths place and an even number in the tenths digit. The sum of the tenths and hundredths digit is 9. What are the possible four-digit numbers?
  6. decimals

    ` a four digit number between 12 and 13 has an odd number in the hundredth place and an even number in the tenths place. the hundreths digit is greater than the tenths digit. the sum of the tenths and hundreths digits is 9. what are …
  7. decimals

    a number has four digits. the digit in the hundredth place is greater than the digit in the hundreths place of 4.361. the digit in the thousandths place is greater than the digit in the tenths place of 2.85. what are the possible four-digit …
  8. Math

    Take a four digit number (abcd) and repeat it to make an eight digit number (abcdabcd). This eight-digit number always has at least three different prime factors, unless you start with a certain four-digit number. Which number is it?
  9. Math

    Take a four digit number (abcd) and repeat it to make an eight digit number (abcdabcd). This eight-digit number always has at least three different prime factors, unless you start with a certain four-digit number. Which number is it?
  10. math

    Answer the following questions below that go with the following: Let's say that a locker combination lock uses numbers 0 through 39 for a 3 digit combination. 1.) Exactly how many combinations are possible if NO digit may be repeated?

More Similar Questions