Reasoning Ability - Calendar Problems
If 1st March 2019 was Friday, what day was 1st March 2021?
If 1st March 2019 was Friday, what day was 1st March 2021?
medium Q14 of 15
Step-by-Step Solution
Step 1: List years crossed
From 1 Mar 2019 → 1 Mar 2021 we cross years 2019 and 2020.Step 2: Sum odd-day contributions
2019 = ordinary → +1; 2020 = leap → +2. Total shift = 1 + 2 = +3 odd days.Step 3: Apply shift to weekday
Base day = Friday. Friday + 3 = Monday.Final Answer:
Monday → Option DQuick Check:
Sum of odd days = 3 → Friday → Monday ✅
Quick Trick: For multi-year moves, add each year’s contribution (ordinary =1, leap =2) then reduce mod 7.
Common Mistakes:
MISTAKES- Treating the 2-year move as two ordinary years (would give +2 instead of +3).
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