in reply to Re^2: More simple math.
in thread More simple math.

Step 1: this is obviously a problem to be solved in base 4, so translate both rows into base 4.

Step 2: last digit is the same between rows, first one is reversed

Step 3: reversing first digit is XOR with 0b1100 which is 12

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Re^4: More simple math.
by BrowserUk (Patriarch) on Mar 12, 2015 at 18:46 UTC

    The explanation is almost better than the solution :) Thanks.

    There's a thread around here asking for uses of xor, you should add this one.

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