2010 AMC 10A Problem 10
Below is the professionally curated solution for Problem 10 of the 2010 AMC 10A, from LIVE by Po-Shen Loh. You can also try the full timed exam, view all 2010 AMC 10A solutions, or check the answer key.
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Difficulty rating: 1480
10.
Marvin had a birthday on Tuesday, May 27 in the leap year In what year will his birthday next fall on a Saturday?
Solution:
Note that on a normal year, we have that which means that for a specific day, it moves to the day after the next year.
On a leap year, the day of the week moves forward two since there is an extra day.
Then in this day falls on a Wednesday. In it falls on a Thursday.
Similarly, in it falls on a Friday. In however, since it is a leap year, it falls on a Sunday.
Now, for the next three years, the day moves forward one. Then in it moves forward two, landing on a Friday.
Finally, in the day of the week is a Saturday.
Thus, E is the correct answer.
Problem 10 in Other Years
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