Once upon a time, John writes down the numbers \(1\) to \(999\). 1. How many digits did John write, in total?
2. What is the sum of all the digits that John wrote down?
The answer to the first is 2889. I'm stuck on the second one though.
Oh thank do you have any work on the second one yet?
Between 1 and 99 =900 and
Between 100 and 999 =12,600
12,600 + 900 =13,500 between 1 and 999 inclusive.
Thankyou so much!
i thought you mean factorial lmao 999! is a very big number.
