CAT 2017 – Slot 2 – Logical Reasoning and Data Interpretation – At a management school, the oldest 10 dorms, numbered 1 to 10, need to be repaired urgently

Q1) As per the options, Dorm 1 needs a moderate repair is possibly true. Dorm 5 does not need more than Rs.4 crore, which is true. Hence, Dorm 10’s repair not costing more than Rs.4 crore is not necessarily true as it may require Rs.6 crore or Rs.1 crore. Option (D) 

Q2) As per the question, number of dorms with repair cost as 3 crores = 3
Since Dorm 1 and 2 already have the repair cost as Rs. 3 crores.
So, out of Dorm 5 and 9, only one can have the repair cost as Rs. 3 crores
Total cost = 3+3+3/4+6+4/3 = 19
Ans : 19

Q3) 4 of the 10 dorms are women’s dorms which need Rs.20 crore for repairs. As per the question, from 1 to 5 there is only one women’s dorm. This is possible with repairing costs Rs.6, Rs.6, Rs.5 and Rs.3 crore. Among the first 5, dorm 4 should be women’s dorm. Rs.6 cr dorms can only be dorm 7 and dorm 10. Rs.3 crore can be from dorm 1, 3, 5 or 9. But 1, 3 or 5 are not women’s dorm. So it has to be dorm 9. The repair cost for dorm 9 is Rs.3 crore. So, 3 crore is the right answer.
Answer: 3

Q4) 4 of the 10 dorms are women’s dorms which need Rs.20 crore for repairs. Also from 1 to 5 there is only one women’s dorm. This is possible with repairing costs Rs.6, Rs.6, Rs.5 and Rs.3 crore. Among the first 5, dorm 4 should be women’s dorm. Rs.6 cr dorms can only be dorm 7 and dorm 10. Rs.3 crore can be from dorm 1, 3, 5 or 9. But 1, 3 or 5 are not women’s dorm. So it has to be dorm 9. Dorm 10 should be women’s dorm.
Option (D)