Can You Measure 45 Minutes With 2 Ropes Burning for 1 Hour Each? скачать в хорошем качестве

Can You Measure 45 Minutes With 2 Ropes Burning for 1 Hour Each?

This video covers 3 problems from the Green Book. Problem 1: Burning Ropes You have two ropes, each of which takes 1 hour to burn. But either rope has different densities at different points, so there's no guarantee of consistency in the time it takes different sections within the rope to burn. How do you use these two ropes to measure 45 minutes? Problem 2: Trailing zeros How many trailing zeros are there in 100! (factorial of 100)? Problem 3: Horse race There are 25 horses, each of which runs at a constant speed that is different from the other horses'. Since the track only has 5 lanes, each race can have at most 5 horses. If you need to find the 3 fastest horses, what is the minimum number of races needed to identify them? #brainteasers #question #finance #interview