they correspond to four complete oranges.
This is why describing the image as containing eight orange halves representing four whole oranges is probably the clearest way to explain the puzzle.
The Arrangement Makes It Even Easier to Miss
The positioning of the pieces also encourages a quick answer.
They are arranged neatly in three rows:
Top row: 3 orange halves
Middle row: 2 orange halves
Bottom row: 3 orange halves
The balanced arrangement makes it natural to count each piece individually. Once you get the number eight, you may feel