SOLUTION: using numbers 0 through 9, how many 6 digit numbers are possible if a leading 0 is allowed?

Algebra.Com
Question 858418: using numbers 0 through 9, how many 6 digit numbers are possible if a leading 0 is allowed?
Answer by Edwin McCravy(20054)   (Show Source): You can put this solution on YOUR website!
Two ways to do it:

First way:

000001 through 999999 is 999999 numbers, 
and 000000 makes 1000000 numbers.

Second way:

10 ways to choose the 1st digit, times
10 ways to choose the 1st digit, times
10 ways to choose the 1st digit, times
10 ways to choose the 1st digit, times
10 ways to choose the 1st digit, times
10 ways to choose the 1st digit, times

10×10×10×10×10×10 = 106 = 1000000

Edwin
RELATED QUESTIONS

How many 3-digit codes using the digits 0 through 9 are possible if repetitions are... (answered by Alan3354)
How many even 4-digit numbers can be made using 0, 2, 3, 5, 6, 9 if no repeats are... (answered by kingme18)
Four-Digit Number. How many four-digit numbers can be formed using the digits 0, 1, 2, 3, (answered by MathLover1,jilalbenkad)
How Many 5 digit numbers are possible if no digit can be repeated (and 0 as the first... (answered by Fombitz)
How many two-digit even numbers from 0-9. a. repetition is allowed b. no... (answered by Alan3354)
How many five-digit numbers can be formed using the digits 0,1,2,3,4,5,6,7,8,&9 if the... (answered by josmiceli)
How many four-digit numbers can be formed using the digits 0,1,2,3,4,5,6,7,8, and 9 if... (answered by ikleyn)
The access code consists of four digits. The first digit cannot be zero and the last... (answered by ikleyn)
How many 6-digit numbers are there in 4,6,2,3,7 and 9 if repetition is not... (answered by Theo)