So little action on this forum I've contrived this little puzzle.
Five couples live on the same street, they are amazed to discover that the reciprocals of their house numbers when summed is equal to 1.
Furthermore when one of the couples gets divorced and they sell their property to buy two houses the reciprocals of all 6 houses sums to 1.
At what number did the divorced couple live at?
(Probably multiple solutions ... I have the easy one!)
😀
Originally posted by PonderableThe former post was wrong...
I wrote a lengthy bit on how to obtain the numbers, but I leave you with the solution only:
5 houses: 2,3,12,18,36
6 houses: 2,6,9,12,18,36
I think there are a lot of solutions, lets try for a few:
5 pairs: 2,4,9,12,18
6 pairs: 3,4,6,9,12,18 (splitting the 1/2 into 1/3 + 1/6)
5 pairs: 3,4,5,6,20
6 pairs: 3,4,5,9,18,20 (splitting the 1/6 into 1/9+1/18)
5 pairs: 2,4,9,12,18
6 pairs: 2,5,9,12,18,20 (splitting the 1/4 into 1/5 and 1/20)
5 pairs: 2,4,9,12,18
6 pairs: 3,4,6,9,12,18
5 pairs: 2,4,9,12,18
6 pairs: 2,4,9,16,18,48
...and so on