If 1st January 2006 was a Sunday, what day of the week was 1st January 2010?
Answer and explanation
Correct answer: C. Friday
- Step 1: Between 2006 and 2010, there are 4 years: 2006, 2007, 2008 (leap year), and 2009.
- Step 2: Non-leap years contribute 1 odd day each (), and leap year 2008 contributes 2 odd days.
- Step 3: Total odd days = .
- Step 4: Sunday + 5 days = Friday.
Answer
Friday.
Why not the others: Thursday forgets the leap day in 2008; Saturday adds an extra day; and Sunday assumes a complete 7-day cycle.
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