Trading Intern

I applied to Gray Whale Capital, online through their website. They have an email on the contacts section; I used that to email my resume to them. I got an email from them in about 3 weeks, asking me for a phone interview for their trading intern program during the summer. The interview was purely quantitative. The person interviewing me was a trader and he asked me a bunch of mental math and probability questions, which included a russian roulette problem. He also asked me to add, subtract, and multiply numbers to test my mental math. Another question he asked me was about flipping a bunch of coins and calculating the probability of getting heads or tails.
I would recommend doing some basic mental math in preparation for the interview, and going online and seeing common interview probability questions. The interview was fairly informal.