Can you find a 14 digit number containing two each of the digits one to seven?
The two 7s are separated by seven other digits;
The two 6s are separated by six other digits;
The two 5s are separated by five other digits;
The two 4s are separated by four other digits;
The two 3s are separated by three other digits;
The two 2s are separated by two other digits;
The two 1s are separated by one other digit.
Click here for a clue to get you started
One solution is:
4 6 3 5 7 4 3 2 6 5 2 1 7 1
Is that the only one?
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