SAT Math Multiple Choice Practice Question 340: Answer and Explanation

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Question: 340

10. The first day of a particular month is a Tuesday. What day of the week will it be on the 31st day of the month?

A. Wednesday
B. Thursday
C. Friday
D. Saturday
E. Sunday

Correct Answer: B


B If you have the patience, you can write out a quick calendar for yourself to track the days:

Or you can use the simple fact that successive Tuesdays (like any other days) are always 7 days apart. Therefore, if the 1st of the month is a Tuesday, so are the 8th, the 15th, the 22nd, and the 29th. Therefore, the 30th is a Wednesday and the 31st is a Thursday.

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