Reasoning Ability - Calendar Problems
If 1st January 1600 was Saturday, what day was 1st January 1800?
If 1st January 1600 was Saturday, what day was 1st January 1800?
hard Q9 of 15
Step-by-Step Solution
Step 1: Span
1600 → 1800 = 200 years.Step 2: Odd days
Each 100-year = 5 → total = 10 → 10 mod 7 = 3.Step 3: Apply shift
Saturday + 3 = Tuesday.Final Answer:
Tuesday → Option DQuick Check:
+3 → Saturday → Tuesday ✅
Quick Trick: Two centuries → 10 odd days ≡ 3 mod 7.
Common Mistakes:
MISTAKES- Adding directly without reducing modulo 7.
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