There are18plantsto be planted in9 rowswith5 plantsin each row. Can anyone please give a diagram?

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- June 22nd 2009, 12:50 AMgaurav517Tree-Planting Problem
There are

**18****plants**to be planted in**9 rows**with**5 plants**in each row. Can anyone please give a diagram? - June 22nd 2009, 05:03 AMaidan

It should be obvious that some plants MUST appear in more than 1 row simultaneously.

If you placed one plant in the center with 9 radiating lines and a plant at the end of each line, you would have a total of ten plants with 9 lines. 8 plants remaining. Since the 8 cannot be divided by the 9 lines, it means that some plants must also appear in three different lines at the same time.

- June 22nd 2009, 06:54 PMwytiaz