View All num of num Add Photos Citadel www.citadel.com Engaged Employer Overview Reviews Salaries Interviews Jobs Photos Benefits 78 Reviews 424 Salaries 81 Interviews Follow Add Interview Follow Add Interview Interview Question Quantitative Researcher Interview(Student Candidate) Chicago, IL Citadel You have two strings whose only known property is that when you light one end of either string it takes exactly one hour to burn. The rate at which the strings will burn is completely random and each string is different. How do you measure 45 minutes? Tags: See more , See less 8 Answer Add Tags Answer Interview Answer 1 Answer ▲ 5 ▼ Burn one string from both ends, it will vanish in 1/2 hr. At the same time, burn other string at one end.Once first string has burned completely, burn the second string at other end as well. It will take 15 minutes (in additional to first 30 minutes) for second string to completely burn. Neo on Jun 27, 2012 Interviews > Quantitative Researcher > Citadel Add Answers or Comments To comment on this, Sign In or Sign Up.