FACT OR FICTION?
You probably did a lot of searches on Google and other Q&A websites where people told you "strawberries are the only fruit with seeds on the outside". Just because it's on the Internet doesn't make it true!
World Book Web Facts:
Berry, as defined by botanists, is a fleshy, many-seeded fruit. It has its seeds embedded within the flesh of a single, juicy, enlarged ovary. Blueberries, tomatoes, and grapes are berries. But strawberries, blackberries, and raspberries are not berries by the botanical definition. Most people call any small, fleshy fruit that contains many seeds a berry.
The fleshy part of the strawberry is covered with dry, yellow "seeds," each of which is actually a separate fruit, which are often called an accessory fruit. The fleshy, sugar parts of a strawberry are not derived from the ovaries. What we call the "seeds" are derived from the ovaries through, making them the true fruit. So the true seeds are, as with all seeds of fruits, inside the fruit.
So it is fiction.