Might have to give up on this one... Just looked through two months of pictures and they all seem to be of even numbers, or too many to count! LOL
Changed my mind and posted after all :)
In decorating you are also supposed to use odd numbers, vases on a shelf, books stacked on tables, so is a good basic rule to be aware of.
Also in gardening you should plant an odd number of flowers. Two or four of a plant don't look as nice or as natural. I knew this about gardening but not about photography.
Let us know what you think, in the comments below: