abcdefghijkl
X 9
lkjihgfedcba
What is the 12 digit
number abcdefghijkl ?
Suppose
that N is a positive number written base 10, and that 9xN has the same digits
as N but in a reversed
order.
Then we shall say for short that N is a 9-Flip
Find all 9-flips with 12 digits
Is
it possible to say exactly how many 9-flips there are with precisely n digits?
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