Q Core Medical interview questions

Two steps interview. First with HR. As usual, minor questions about where do you see yourself in 5 years and so. Preliminary salary expectations. Second one with the hiring manager. Riddles with no time to think about the solution. The interview goes on in the same time while solving the riddles. No time to think or write down the steps. Some of the riddles where finding a connection between series of numbers that included natural logarithmic function.

four interviews with a lot of "home work", followed by a positive response and then disappeared without a trace and were not responsive. the process included 3 personal interviewers and a presentation. All in all I do not recommend starting the process there as I heard two similar feedbacks