IBM Intern interview questions

they email me first. set up a phone interview, 5 people ask lots of questions. both architecture, algorithm. The interview is 3pm est, I thought it was 3pm local time. It was unexpected. Not that hard, but seems the position doesn't fit me well.

I sent my CV for a position of intern in Business Performance Services, it's like internal consulting, as they don't hire other consulting firms. I had 3 1:1 interviews. They went through my CV and asked questions: case (estimate market of office buildings in Moscow; explain why company has decreasing income, while number of clients is growing (company is of course IT)), some simple problems on probability with coins.