Reasoning Ability - Calendar Problems
According to Zeller’s Rule, what day of the week was 26th January 1950 (Republic Day of India)?
According to Zeller’s Rule, what day of the week was 26th January 1950 (Republic Day of India)?
easy Q1 of 15
Step-by-Step Solution
Step 1: Adjust month/year for Zeller
January → treat as month 13 of previous year. So use:q = 26,m = 13,year = 1949.Step 2: Compute K and J
K = 1949 % 100 = 49,J = floor(1949 / 100) = 19.Step 3: Evaluate formula components
floor(13*(m+1)/5) = floor(13*14/5) = 36;floor(K/4)=12;floor(J/4)=4;5*J = 95.
Sum:h = (26 + 36 + 49 + 12 + 4 + 95) = 222→222 mod 7 = 5.Step 4: Map result to weekday
Zeller mapping used here:0=Saturday, 1=Sunday, 2=Monday, 3=Tuesday, 4=Wednesday, 5=Thursday, 6=Friday. Soh=5→ Thursday.Final Answer:
Thursday → Option AQuick Check:
Alternate odd-day methods and historical calendars confirm 26-Jan-1950 was Thursday ✅
Quick Trick: For Jan/Feb use month 13/14 of previous year; reduce the sum modulo 7 early.
Common Mistakes:
MISTAKES- Forgetting to decrement the year for Jan/Feb or mis-mapping Zeller's h value.
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