math
posted by HELP HELP HELP MNHS .
Please give me the technique (short method) in this question...
How many 4digit numbers are multiples of 9?

There are 10000999 4digit numbers
1/9 of them are multiples of 9.
posted by HELP HELP HELP MNHS .
Please give me the technique (short method) in this question...
How many 4digit numbers are multiples of 9?
There are 10000999 4digit numbers
1/9 of them are multiples of 9.