Calendar reasoning — Given that Monday falls on 20 March 1995, determine the day of the week on 3 November 1994 (use the given anchor date, not real-world memory).

Introduction / Context:Calendar questions often provide one “anchor” date and ask you to deduce the day on another date. The skill is to convert dates to an offset in days and then take that offset modulo 7 to map back to a weekday.

Given Data / Assumptions:

• Anchor: 20 March 1995 is a Monday (given).
• Target: 3 November 1994 (earlier date).
• Weekdays repeat every 7 days.

Concept / Approach:When moving from the anchor to another date, count the exact number of days between the dates, then shift the weekday by (difference mod 7). A negative shift just means “go backward.”

Step-by-Step Solution:

Verification / Alternative check:Working forward: 3 Nov 1994 → add 137 days → Monday implies the start was Monday − 4 = Thursday. Same result.

Why Other Options Are Wrong:

• Tuesday/Sunday: These correspond to different remainders mod 7 and do not match the computed offset.
• None of these: A valid weekday (Thursday) matches.

Common Pitfalls:

• Forgetting that 1995 is not a leap year.
• Counting 3 Nov inclusively or exclusively inconsistently; keep a consistent convention.

Final Answer:Thursday