Puzzling Asked on November 28, 2020
A positive integer n (without leading zeros) has the property that shifting the rightmost digit of n to the left end doubles the number.
Examples: 1->1, 1234->4123, 2020->202
What is the smallest n with this property?
I think the answer is
Proof
Computer check
Correct answer by hexomino on November 28, 2020
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