It was Sunday on Jan 1, 2006. What was the day of the week Jan 1, 2010?
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Sunday
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Saturday
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Friday
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Wednesday
C
Correct answer
Explanation
From Sunday Jan 1, 2006 to Jan 1, 2010 spans 4 years. Among these, only 2008 is a leap year (366 days), while 2006, 2007, and 2009 are normal years (365 days each). Total days = 3×365 + 366 = 1461. Dividing by 7: 1461 ÷ 7 = 208 weeks with remainder 5. Sunday + 5 days = Friday. So Jan 1, 2010 was a Friday.