Six lectures A, B, C, D, E and F are to be organised in a spam of seven days -- from Sunday to Saturday, only one lecture on each day in accordance with the following :

  1. A should not be organised on Thursday.
  2. C should be organised immediately after F.
  3. There should be a gap of two days between E and D.
  4. One day there will be no lecture (Friday is not that day), just before that day D will be organised.
  5. B should be organised on Tuesday and should not be followed by D.

Which of the following is the last lecture in the series ?

A. A
B. B
C. C
D. Cannot be determined
E. None of these
Answer: A . A


B is organised on Tuesday. Now, D is followed by the day with nno lecture. D cannot be organised on Friday because then E will be on Tuesday (there is a gap of two days between D and E). It cannot be organised on Thursday (because then, there will be no lecture Friday). B cannot be followed by D. So, D will be organised on Sunday and E on Wednesday. No lecture will be organised on Monday. A cannot be organised on Thursday. So, A will be organised on Saturday. F and C will be organised on Thursday and Friday respectively.

So the correct order is :

Sunday Monday Tuesday Wednesday Thursday Friday Saturday
D x B E F C A

So, A is the last lecture.