Question

can some one explain how many 6 digit numbers there in all

Answer 1

i think 99 numbers are of six digit numbers

Answer 2

However, you said 6 digit numbers without a hyphen, and there's only one number whose single digit is 6, so one… Method 1: 100000 is the smallest 6-digit number.999999 is the biggest. There are 999999–100000+1=900000 6 digit numbers, since the previous one and the next one always differ by one.