>>>>>8 4 1.
>>>>
>>>>No, that is not the solution.
>>>>> I guess the question is when is a son old enough to have a room upstairs.
>>>>
>>>>Any statement about "the oldest son" can be used for the third clue; what the son does is irrelevant. For example, "My oldest son is playing in the park", or "My oldest son is asleep", or "My oldest son likes such-and-such music".
>>>>
>>>>>You didn't say old man which would rule out an answer like 7 4 and 2.
>>>>
>>>>You don't know the age of the second man, but we can be quite sure that he knows his own age.
>>>
>>>Ok. That is simply ruling an elder set of twins.
>>>Let me think on it some more.
>>
>>Simply get all the age combinations that add up to 13. There are not that many of them.
>
>10 2 1 20
>9 2 2 36
>8 4 1 32
>8 3 2 48
>7 5 1 35
>7 4 2 56
>7 3 3 63
>
>Ok. :)

There are actually a few more combinations.

11 1 1   11
10 2 1   20
 9 3 1   27
 9 2 2   36
 8 4 1   32
 8 3 2   48
 7 5 1   35
 7 4 2   56
 7 3 3   63
 6 6 1   36
 6 5 2   60
 6 4 3   72
 5 5 3   75
 5 4 4   80

... a total of 14 combinations. Question: Why wasn't the second piece of information enough to figure out the ages?