How many watermelons can you count?
The text of the riddle does not specify whether you can count parts of watermelons as well. That’s why the answer ’8′ is acceptable.
If you count the number of watermelons used to take this picture, the correct answer is ’6.’
If you count watermelons as a whole, the correct answer is ’5.’ 4 watermelons without quarters and 4 watermelons divided into halves will be: (4×0.75) + (4×0.5) = 5.