Question

how many four digit numbers are there in all​

Answer 1

Answer:

There are no four digit numerals. There are 9,000 four digit whole numbers.

Answer 2

Answer:

from 1000....... 9999

Step-by-step explanation:

The smallest 4−digit number =1000.

⇒  The greatest 4−digit number =9999. 

⇒  Total 4− digit numbers =(9999−1000)+1 

                                              =8999+1

                                              =9000  

So, we say that we have 9000 four-digit numbers.