Reasoning Ability - Calendar Problems
If 1st January 2001 was Monday, what day was 1st January 2006?
If 1st January 2001 was Monday, what day was 1st January 2006?
medium Q5 of 15
Step-by-Step Solution
Step 1: Count years
From 1 Jan 2001 to 1 Jan 2006 is 5 full years: 2001,2002,2003,2004,2005.Step 2: Count leap years in span
2004 is leap → 1 leap year and 4 ordinary years.Step 3: Odd days
Ordinary years contribute 1 each → 4×1 = 4; leap year contributes 2 → total = 6 odd days.Step 4: Apply shift
Monday + 6 days = Sunday.Final Answer:
Sunday → Option AQuick Check:
5-year span with one leap yields +6 day shift → Monday → Sunday ✅
Quick Trick: Add 1 for ordinary years, 2 for leap years, reduce mod 7.
Common Mistakes:
MISTAKES- Forgetting leap-year contribution in multi-year spans.
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