There is a monkey lover called Richard, and he collects stamps of monkeys in a binder. The last time when he checked, he had 8351 stamps of monkeys.
One day, he found another 100 stamps. Going to his binder, he found that his stamps were all gone! He suspects these people:
Jeff: The landlord. Loves collecting stamps.
Jack: His brother. Loves stuffed animals, especially monkeys.
Thief: His other brother. A kleptomaniac.
Richard gathered them before him, and asked, “Where are my monkey stamps?”
And here are their alibis:
Jeff: I would love to have your stamps; unfortunately, I don’t have them.
Jack: Why would I want your silly 8351 stamps?
Thief: What stamps?
Richard said, “I know which one of you stole my stamps; you had better give them back!”
Solution
It was Jack. No one else knew Richard had 8351 stamps except himself and Jack.
Jack said, “OK, I’m sorry. I just wanted to get some more monkeys with the money I would have got if I sold the stamps.”
Richard replied, “Well, look in the newspapers for a job. I think there’s one that pays two monkeys per hour.”
“Really?”
“Really.”
“Then I’m going to go and get me a job!”
