What is the smallest k-digit number so that its last pair of digits is k times the first pair of digits?
(In reply to re(2): Possible solution
The 00 solution is partially right, but:
a) 0/0 is any number, not necessariy 3 or 13
b) the zero quantity is a single digit 0, neither 00 nor 0000000000000.
I promise to adress the issue of this particular post later.