Optiver Quantitative Research Internship Phone Screen Experience

I'd heard Optiver was a big name in the quant field, so two weeks ago I randomly applied for a Quantitative Research Intern position. About two days later, I received an online assessment (OA). After

I'd heard Optiver was a big name in the quant field, so two weeks ago I randomly applied for a Quantitative Research Intern position. About two days later, I received an online assessment (OA). After glancing at the questions, I realized my core skills didn't match Optiver's requirements at all, so I decided not to bother. Surprisingly, after the OA expired, their HR emailed me, jokingly asking why I hadn't taken it. I jokingly replied, "Oh, I've had too many interviews lately, I just couldn't keep up." Then, in a very casual tone, the HR sent me an interview invitation... So, I went for the first round, which, like many interview experiences described, involved a gambling game, with n rounds. Each round had the following conditions: Three coin tosses: H>T; T>H; HTH or THT; HHH or TTT Two dice rolls: SUM = 2 or 3; SUM = 4; SUM = 10; SUM = 11 or 12; SUM is odd. SUM is even. Draw three playing cards. The product of the first two cards is greater than 20; greater than 100; odd; even. There's also a market where you bid on the sum of the three cards. Prices fluctuate, and you can buy or sell. If you buy below the actual sum or sell above, you win; otherwise, you lose. The odds and scenarios are randomly generated and change every round. You need to quickly calculate in your head whether it's worth betting. After calculating, deciding how to bet requires an intuition about numbers/gambling/market fluctuations. I later asked the interviewer why he asked such questions, and he replied that Optiver wanted to find people who could quickly identify market opportunities under pressure. During the interview, I felt I could roughly calculate which scenarios were worth betting on, but I had no idea how to allocate my investment. In the end, I lost 1000 and only had 500 left. The interviewer spoke incredibly fast, and his facial expression throughout looked like he was looking at an idiot. I was definitely going to fail, haha.