Saturday

January 31, 2015

January 31, 2015

Posted by **john** on Friday, March 25, 2011 at 3:27pm.

- math -
**Reiny**, Friday, March 25, 2011 at 5:07pmnumber of different 4 digit number

= 9x10x10x10 = 9000

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

- math -
**Reiny**, Friday, March 25, 2011 at 5:09pmIn my answer, I assumed that you can repeat a number

If each can be used only once, then

number of ways = 9x9x8x7 or 4536

**Answer this Question**

**Related Questions**

math - A four-digit number between 12 and 13 has an odd number in the hundredths...

COMBINATION!!MATH!!!hurryyy!!! - Cards are drawn at random from a 52-card deck. ...

Math - How many different three-digit numbers can be written using the digits 4...

Math. Explain - From the digits 1, 2, 3, and 4, how many positive integers are ...

decimals - ` a four digit number between 12 and 13 has an odd number in the ...

decimals - a number has four digits. the digit in the hundredth place is greater...

Math (Reiny) - Regarding my question below, when the question talks about digits...

6 th grade Math - You can find the total number of different 4-digit numbers of ...

Math- Problem solving - A number has 4 digits. The digit in the hundredths place...

MATH - Need Answer to the Following Please: Using the 9 digits, 1, 2, 3, 4, 5, ...