Logical reasoning in the CSAT paper requires a clear mind and simple tricks. Let’s look at a classic PYQ pattern.
Q1. A person climbs a hill in a straight path from base ‘B’ on the ground to the peak ‘P’ on top. He returns by the same path. Which one of the following graphs best represents the relationship between the distance from the base and the time? (UPSC CSAT)
Analysis: This tests basic physics and logic. When climbing up, speed is slower, so distance increases slowly over time. When coming down, speed is faster, so distance decreases rapidly over time. Thus, the graph will be an asymmetrical inverted ‘V’ shape, with a steeper slope on the descent.
Q2. If 3rd Day of a month is Monday, which of the following will be the 21st day of that month? (UPSC CSAT)
Shortcut/Analysis: The calendar repeats every 7 days. If the 3rd is Monday:
3 + 7 = 10th is Monday
10 + 7 = 17th is Monday
Therefore, 18th is Tuesday, 19th is Wednesday, 20th is Thursday, and the 21st is Friday.