others to appear clustered together. Your attention can jump from one cluster to another and leave a small group uncounted. Slowing down is enough to remove much of that confusion; there is no need to accept thirteen or fourteen just because those are the numbers presented.
The final answer remains sixteen. The challenge rewards careful observation and an independent check of the choices. Before choosing an answer in a visual puzzle, make sure the proposed options actually include the result you can demonstrate from the image.
A careful count should
