Deloitte Intern (Audit) interview questions

One interview with an audit manager was held. The interview was relaxed and the interviewer asked questions to get to know more about the interviewee. The company got back with an offer a few days later

My performance was flawless still unfortunately was unable to secure a Job offer really disheartening. The questions were check prime, check if a number is Fibonacci and some puzzles easily found on the internet like the horse race stack puzzle.