Question

the total number of 8 digit number is​

Answer 1

180,000,000

Positive 8 digit numbers run from 10,000,000 to 99,999,999. There are 90,000,000 of them. But for each positive number, there is a corresponding negative number. So the total is 180,000,000 .

Answer 2

Answer:

8 digit nos start with 1,00,00,000,...and end with 9,99,99,999.

total nos are 9,00,00,000.

we generally take numbers as positive,if we want all the numbers, i.e both +ve &-ve 8 digit integers,then the total nos will be 9,00,00,000*2=18,00,00,000