perplexus.info :: Logic : Beginning of the Month

Beginning of the Month (Posted on 2017-01-09)

In a particular year there were exactly four Mondays in January as well as exactly four Fridays that month. What day of the week was January 1?

See The Solution Submitted by Charlie

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Answer

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January 1 was Tuesday. The 4 Mondays were January 7, January 14, January 21, and January 28. The 4 Fridays were January 4, January 11, January 18, and January 25.

Posted by Math Man on 2017-01-15 09:56:00

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