It's been an interesting few days and now I'm playing catch-up.  I don't have a new riddle, but I do have the solution to last week's riddle. 

Here is the solution to last week's riddle:

Riddle #73:
The neighbour borrowed an extra cow, to make the total number of cows 18. Then the oldest son got 1/2 of 18 is 9 cows, the middle son got 1/3 of 18 is 6 cows, and the youngest son got 1/9 of 18 is 2 cows. Since 9+6+2 = 17, the cows could be divided among the three brothers in such a way that the borrowed cow was left over, and could be returned to its owner.

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