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dimbulb · 11-18-2003, 07:09 AM

Got bombarded with a bunch of puzzles during an interview for an investment bank.

Good thing they ask these general questions, because I don't know a thing about finance. I'll willing to learn of course, and I'm prepared for the 70hour weeks.......

anyway... here goes..

Say that you have a an elevator that stops at 5 floors. It goes in sequential order, up and down. (1-2-3-4-5-4-3-2-1-2-3-4-5-4-....) and stops at each floor for 15 minutes. Assume it takes no time to go between floors.

Say you just arrived at the 4th floor. What is the probability that the next elevator at the 4th floor is going up? The elevator may or may not be there when you arrive.

11-18-2003, 07:09 AM	#1 (permalink)
dimbulb Riiiiight........	Puzzle about elevators.... Got bombarded with a bunch of puzzles during an interview for an investment bank. Good thing they ask these general questions, because I don't know a thing about finance. I'll willing to learn of course, and I'm prepared for the 70hour weeks....... anyway... here goes.. Say that you have a an elevator that stops at 5 floors. It goes in sequential order, up and down. (1-2-3-4-5-4-3-2-1-2-3-4-5-4-....) and stops at each floor for 15 minutes. Assume it takes no time to go between floors. Say you just arrived at the 4th floor. What is the probability that the next elevator at the 4th floor is going up? The elevator may or may not be there when you arrive.