To complete this puzzle you have to be aware of two things: Roman numerals and the 24 hour clock. Translated from Roman numerals, the equations read as follows:
12 + 4 = 4
4 + 10 = 2
4 x 11 = ?
Think about a clock face and look at the first equation. If you are at 12 and you add four hours, you get 4. The second equation: if you are at 4 and you add ten hours, you swing round to 2 on the clock face. But the last equation is multiplication: 4 x 11. But 44 (or XLIV in Roman numerals) is not the answer. This is because on a clock face, every hour can be written in one of two ways. Any time after 12 noon can be written as 13, 14, 15, 16 up to 23. (12 midnight is typically written as 00.)
So without having any further hints on which to act, the answer will be one of the following:
4 AM x 11 AM = 44
4 PM (16) * 11 AM = 176
4 AM * 11 PM (23) = 92
4 PM (16) * 11 PM (23) = 368
That last one - 368 - will open the door. In Roman numerals it is CCCLXVIII.
If anyone knows why it's 368 and not one of the others, let me know in the comments!
12 + 4 = 4
4 + 10 = 2
4 x 11 = ?
Think about a clock face and look at the first equation. If you are at 12 and you add four hours, you get 4. The second equation: if you are at 4 and you add ten hours, you swing round to 2 on the clock face. But the last equation is multiplication: 4 x 11. But 44 (or XLIV in Roman numerals) is not the answer. This is because on a clock face, every hour can be written in one of two ways. Any time after 12 noon can be written as 13, 14, 15, 16 up to 23. (12 midnight is typically written as 00.)
So without having any further hints on which to act, the answer will be one of the following:
4 AM x 11 AM = 44
4 PM (16) * 11 AM = 176
4 AM * 11 PM (23) = 92
4 PM (16) * 11 PM (23) = 368
That last one - 368 - will open the door. In Roman numerals it is CCCLXVIII.
If anyone knows why it's 368 and not one of the others, let me know in the comments!
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