%% PROBABLY not the math skills, its more than a CPA job, with numbers handpicked by MS. Most likely\ the practical picture or the ship- the Titanic he kept for many years. Just a guess.
%% Let's hope MS is not his Titanic. Math skills are not necessary or sufficient conditions to be a successful CEO.
When you are senior enough at an investment bank, the only thing that sinks you is diddling a little boy.