Google Quantitative Analyst interview questions

Application I was reached out directly by another Quantitative Analyst for tech screen. He was very late when he called me and told me since we are late, lets begin and started asking questions directly. Questions were easy but he would complicate it by asking weird questions around it. He didn't introduce himself nor asked about my background and I had to ask those things myself when he said do you have any questions? I can't believe this is how Google conducts interviews without any recruiter and some guy reaching out directly who is not punctual and doesn't have any etiquette to introduce himself or tell about team and role. (Foreign accent), It's been weeks since I interviewed and there is no feedback or update as I expected. Also, you cannot expect someone to solve math problem verbally when formula is complicated and involves square root calculation