https://www.gamespot.com/articles/fortnite-challenge-guide-search-between-covered-br/1100-6461733/

We're now in week 10 of Fortnite Season 5, which means there's a fresh set of challenges for players to undertake and new rewards to earn. You should know the drill by now, but if you're jumping on the Fortnite train a bit late, we've got a breakdown of how it works and what you'll need to do. First things first, it's important to know that there's two sets of challenges. There's a free set that's available for anyone and everyone to do, and then an exclusive set that's just for those that have paid for a Battle Pass.

In the free section this week there's three challenges. The first involves searching for jigsaw puzzle pieces in basements, the second requires you to consume apples or mushrooms, and the third demands you eliminate 10 enemies. The final of these is perhaps the trickiest, given that enemies tend to, you know, fight back, but with a little perseverance and guile it shouldn't be too tricky. Munching on apples and mushrooms is a relatively new challenge, and--based on our experience--it's usually more common to stumble upon shrooms than apples. We recommend heading south of Lonely Lodge, where you should find a bunch of them ready to be devoured.