VinSol Associate Software Engineer interview questions

First there was an aptitude round of 40 minutes, 20 questions were asked. Cut-off was very low 6-8 and I solved 18 questions and was selected for the next round. The next round was puzzle round in which we had to solve 2 questions. They gave the sheets and the instructions they gave were not clear. I was sitting at one corner and they gave the instructions on the other side and were least concerned about those who were on the other side. I did solve both the questions but was not selected for the next round. Only 3 out of 17 were selected for the third round. It was a walkin but they had only 2-3 vacancies.