graduate school qualifiers, tested ~6 years of material in a 10 hour stretch over a couple days if i failed, i would have been kicked out of graduate school (look for a job, start paying back loans, being laughed at)
I had the privilege of interviewing with Lehman in late August of last year. In-person interview twice with a bunch of people, followed by a 1 hour excel exam…needless to say, the offer fell through a couple of weeks later. My next interview experience happened to me a 9 - 5 gig, met everyone I’d be working with, was drilled on brain teasers. Had another interview at 5pm that same day, arrived 20 minutes late, drilled on a couple more math questions, but fortunately, the hiring manager and I hit it off so that one wasn’t too bad. Quite the experiences.
The FBI test was very difficult. Not enough time, no calculator, impossible to answer questions… The writing exercise, 4-agent interview, and fitness test were not any less stressful.
Chinese diapers: how many urban middle class+ couples (or those that have actually access to disposable diapers, are inclined to use them and can afford them) are there between 25-40 and how many of them have that 1 baby aged between 1-3? 40% is the dependency rate currently according Economist (as far as I remember). We get around 780 million Chinese in the range of 15 to 60 years old. It is mostly rural - so I assume 30% urban, or 260 million, or 87 million in the age range we need. Let’s say it’s a traditional society and 60% are coupled, we get 58 million, half of them have babies of 1-3 years old. We get around 15 million babies. Let’s say the parents of 30% of these babies can afford diapers. 5 million babies. Now difficult, how many diapers does a baby need per day? Say, 5, so it’s 25 million diapers used per day in China, or over 9 billion per year. We can go further with diapers, and calculate only the current stock using turnover rates.