Left examples have the keyword "number" on the OEBP. The solution must ONLY depend on counting the number of something: no comparison between numbers of different things.
Many (but not all) left examples involve mathematical understanding to solve.
Bongard Problems whose solutions only depend on counting the number of something vs. other Bongard Problems
BP200 is a semi-meta version of this with sides flipped, and with emphasis on feature-based solutions as the opposite of number-based solutions.
BP200 is a semi-meta version of this with sides flipped, and with emphasis on qualitative solutions as the opposite of number-based solutions.
Bongard Problems whose solutions only depend on the number of something vs. other Bongard Problems
