When the digit is placed at the beginning and end of a positive integer N, the new number is 99*N.
Find the smallest value of N.
(In reply to We're going to need more precision (spoiler)
by Steve Herman)
...".multiply it by the smallest digit necessary ..."
which is clearly 1
" make it a length 22 number" = you mean length 21.
Edited on July 11, 2015, 11:23 am