"Cracking the Finance Job Interview Puzzle: Gizmodo's Monday Challenge"

Gizmodo presents a finance job interview puzzle involving a hallway with 100 doors. Each person toggles a specific set of doors, with the first person toggling all doors, the second person toggling every 2nd door, and so on. The question is which doors are open at the end. The article also provides the solution to a previous puzzle involving identifying a poisoned barrel among a group using a limited number of zombies.