Direction: During one week, a human resource director conducts five interviews for a new job, one interview per day, Monday through Friday. There are six candidates for the job - Ram, Shyam, Trilochan, Usha, Veena, and Kishore. No more than two candidates are interviewed more than once. Neither Shyam nor Usha nor Veena is interviewed more than once, and no other candidate is interviewed more than twice. The schedule of interviews is subject to the following conditions :
If Trilochan is interviewed, then Trilochan must be interviewed on both Monday and Friday.
If Shyam is interviewed, then Usha is also interviewed, with Shyam's interview taking place earlier than Usha's interview.
If Ram is interviewed twice, then Ram's second interview takes place exactly two days after Ram's first interview.
If Veena is interviewed, then Kishore is interviewed twice, with Veena's interview taking place after Kishore's first interview and before Kishore's second interview.
If Usha is interviewed, then Ram is also interviewed, with Usha's interview taking place on a day either immediately before or immediately after a day on which Ram is interviewed.

Direction: A scientist is trying to find a cure for the common cold using four ingredients. He can choose from the stable chemicals A, B and C and the unstable chemicals W, X, Y and Z. In order for the formula not to explode, there must be two stable chemicals cannot be mixed because of their reaction together. Chemicals B cannot be mixed with chemicals W. Chemicals C cannot be mixed with chemicals Y. Chemicals Y cannot be mixed with chemicals Z.

Direction: A company wants to select a team of four mechanical engineers from its South Indian Factory for transfer to North India, where they are going to set up a new plant. The company is managed by professional managers and is very particular about human resources and industrial relations. There are seven engineers of equal ability; X, Y and Z ( who are Senior Executive Cadre ) and A, B, C and D ( who are Junior Executive Cadre ). the company requires that there should be two Senior Executives and two Junior Executives in each team. It is also necessary that all the engineers in a particular team are friendly with each other, in order to have a real team spirit and avoid any industrial relations problem in the new factory being set up in the North Following is The situation of relations between the seven engineers :
I. Y and A are not friendly.
II. Z and C are not friendly.
III. A and B are not friendly