The round 1 interview is mental maths and you are not allowed to use any pen, paper or calculator. Actually my interviewer was an HR, and she asked me questions that were randomly picked from a problem set. Interview questions: 1. 72*12% 2. 2,000,000 - 2,022 3. 27*32 4. There is a set of pokers that aces are excluded. What is the probability of taking the first two cards and both of them are 6? 5. What is your confident level of getting at least 2 right answers in the past 4 questions? At least 3? 4 all right? Answer in percentage. 6. There is a bus with some passengers. It stops at 3 times. At each stop, 2/3 of the passengers get off, and 7 passengers get on. What is the minimum number of passengers before the first stop? 7. There are 4 coins. You can flip the coins and get paid as the number of coins that end in heads. If you are not satisfied with the first flip, you can re-flip the coins once, but you have to accept the second result. What is the fare value of this game?