Supervisor Khan has worked more night shifts in a row than Supervisor Ramesh, who has worked five. Supervisor Malik has worked 15 night shifts in a row, which is more than Supervisor Khan and Supervisor Ramesh combined. Supervisor Sham has worked eight night shifts in a row, which is less than Supervisor Khan. How many night shifts in a row did Supervisor Khan work?

This question is based on the five three-digit numbers given below. (Left) 442 405 297 384 316 (Right) What will be the resultant if the third digit of the highest number is added to the second digit of the lowest number?

Each of L, M, N, O, A, B and C has an exam on a different day of a week starting from Monday and ending on Sunday of the same week. No one has an exam before N. Only three people have exams between N and O. Only one person has an exam between O and M. L has an exam on Wednesday. B has an exam on one of the days after C but on one of the days before A. On which day of the week does B have an exam?