Question

how many number in all do we have with 1) 7 digits 2) 9 digits​

Answer 1

Answer:

20-Jul-2017 · 52 answers

(9999999–1000000)+1. = or. Process 2: In each position of 7 digit number, we can have any digit within 0 to 9. So, there are 10 options.

Answer 2

Answer:

1) Smallest 7 digit number = 1000000

Largest 7 digit number = 9999999

9999999 - 1000000 + 1 = 9000000

2) Smallest 9 digit number = 100000000

Largest 9 digit number = 999999999

999999999 - 100000000 + 1 = 10000000000