- #211
- 19,549
- 25,539
45. The sultan has ordered a new harem door. However, as he does not quite trust the five harem watchers and their boss, he makes the following request: The door may only be opened by the chief and any of the harem watchmen -or- any three of the harem watchmen.
The boss and the harem watchman can get as many keys to as many locks as necessary. None of the harem watchmen ever gives their keys away.
What is the smallest number of locks and keys for the door?
D55
The boss and the harem watchman can get as many keys to as many locks as necessary. None of the harem watchmen ever gives their keys away.
What is the smallest number of locks and keys for the door?
D55