Mysterious Journey II Hints

Let's try using the decimal way.

  • 1 of 18: First, let's convert the two base-12 numbers to decimal.
  • 2 of 18: Remember that the left-most digit represents 12 times 12 times 12.  And in the number 3468, there are 3 of those.  That's 5184.
  • 3 of 18: The second digit represents 12 times 12, and in the number 3468, there are 4 of those.  That's 576.  Added to the 5184 (from the first digit), we have a "running total" of 5760.
  • 4 of 18: The third digit represents 12, and in the number 3468, there are 6 of those.  That's 72.  Add it to the 5760 to make our "running total" 5832.
  • 5 of 18: Finally, the last digit represents "ones" -- or, itself.  That's an 8, in our example.  Add it to 5832 to get a final conversion total of 5840.
  • 6 of 18: Now we convert the second base-12 number (8041) to decimal in the same manner:
           12 * 12 * 12 * 8 = 13824
           12 * 12 * 0 = 0
           12 * 4 = 48
           1 = 1
    Add those together to get 13873.
  • 7 of 18: Summing the two decimal numbers results in 5840 + 13873 = 19713.  Now we have to convert that back to base 12.  (Here's where it gets a bit sticky.)
  • 8 of 18: The first digit of our answer, as we said earlier, represents groups of 12 * 12 * 12 -- or 1728.  How many "1728"s are there in 19713?
  • 9 of 18: The answer is 11 -- which is the largest number of times that 1728 will divide into 19713.
  • 10 of 18: What is left, after accounting for "eleven 1728's"?
  • 11 of 18: 11 * 1728 = 19008.  And 19713 (our original number) minus 19008 (which is the value of the first digit) is 705.  So the last three digits of our code must equal 705.
  • 12 of 18: The second of the four digits in our resultant answer represents 12 * 12 -- or 144.  How many "144"s are there in 705?
  • 13 of 18: The answer is 4 -- which is the largest number of times that 144 will divide into 705.
  • 14 of 18: What is left, after accounting for "four 144's"?
  • 15 of 18: 4 * 144 = 576.  And 576 from the remaining 705 would leave 129 for the final two digits.
  • 16 of 18: The third of the four digits in our resultant answer represents the "twelves" place.  How many "12"s are there in 129?
  • 17 of 18: That one should be pretty easy -- there are 10 "12's" in 129, with 9 left over.  So we immediately have the last two numbers of our answer:  10 and 9.
  • 18 of 18: Therefore, the four base-12 numbers in our solution are 11, 4, 10, and 9.