Trials of Job
Giles Turnbull of The Morning News tries his hand at some challenging job interview questions.
Below are a few of the slightly challenging mathematical or Fermi type questions for our readers:
Goldman Sachs: Suppose you had eight identical balls. One of them is slightly heavier and you are given a balance scale. What’s the fewest number of times you have to use the scale to find the heavier ball?
Though I've got to say I would have hoped for something slightly more original than this oldie from GS. Can't they afford a dept of hard job interview questions?
Towers Watson: Estimate how many planes there are in the sky.
Jane Street Capital: What is the smallest number divisible by 225 that consists of all 1’s and 0’s?
I got two different answers, both guaranteed to be correct!
Susquehanna International Group: Five guys, all of different ages, enter a bar and take a seat at a round table. What is the probability that they are seated in ascending order of age?
Another one with more than one defensible answer.