UPSC Prelims 1996 · General Studies
Question 139: Logical Reasoning and Mental Ability
Six roads lead to a country. They may be indicated by letters X, Y, Z and digits 1, 2, 3. When there is storm, Y is blocked. When there are floods X, 1 and 2 will be affected. When road 1 is blocked, Z also is blocked. At a time when there are floods and a storm also blows, which road(s) can be used?
AnswerThe answer is (c).
The storm blocks Y. Floods affect X, 1 and 2. Road 1 being blocked also blocks Z. With both a storm and floods, Y, X, 1 and 2 are out, and Z is out as well because 1 is blocked. Only road 3 remains usable.
Why each option is right or wrong
- (a) Z is blocked because road 1 is blocked, and 2 is hit by floods.
- (b) Z is blocked along with road 1.
- (c) Right: only 3 is left.
- (d) Y is blocked by the storm.
Explanation: written by UPSC Grade, not by UPSC.
Source: UPSC, Civil Services (Preliminary) Examination 1996, General Studies. UPSC's own paper isn't online; the words are from a published compilation. The paper on upsc.gov.in.