Today, 7th grader Beverly W. collaborated with me in working out these solutions. To see if our answers are correct, beginning December 10, 2018, click here to view the official solutions published in the MATHCOUNTS Problem of the Week Archive
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Today, 7th grader Beverly W. collaborated with me in working out these solutions. To see if our answers are correct, beginning December 3, 2018, click here to view the official solutions published in the MATHCOUNTS Problem of the Week Archive
Update 12/3/2018: We got all answers correct. Today, 7th grader Beverly W. collaborated with me in working out these solutions. To see if our answers are correct, beginning November 26, 2018, click here to view the official solutions published in the MATHCOUNTS Problem of the Week Archive
Update 11/26/2018: We got all answers correct. Today, 7th grader Beverly W. collaborated with me in working out these solutions. To see if our answers are correct, beginning November 19, 2018, click here to view the official solutions published in the MATHCOUNTS Problem of the Week Archive
Update 11/19/2018: We got all answers correct. Today, 7th grader Beverly W. collaborated with me in working out these solutions. To see if our answers are correct, beginning November 12, 2018, click here to view the official solutions published in the MATHCOUNTS Problem of the Week Archive
Update 11/12/2018: The first two answers we got correct. Today, 7th grader Beverly W. collaborated with me in working out these solutions. To see if our answers are correct, beginning November 5, 2018, click here to view the official solutions published in the MATHCOUNTS Problem of the Week Archive
Update 11/5/2018: The first two answers we got correct. Today, 7th grader Beverly W. collaborated with me in working out these solutions. To see if our answers are correct, beginning October 29, 2018, click here to view the official solutions published in the MATHCOUNTS Problem of the Week Archive
Update 10/29/2018: All three of our answers are correct. Today, 7th grader Beverly W. collaborated with me in working out these solutions. To see if our answers are correct, beginning October 22, 2018, click here to view the official solutions published in the MATHCOUNTS Problem of the Week Archive
Update 10/22/2018: Our answer to the first problem was correct. Our answer to the second problem was incorrect because we did not round 13.5 to 14, and we used the value for the current year rather than the previous year. Our answer to the third problem was incorrect. Please see the official solution. I believe the third problem is unusually complicated to solve for MATHCOUNTS Problem of the Week. Today, 7th grader Beverly W. collaborated with me in working out these solutions. To see if our answers are correct, beginning October 15, 2018, click here to view the official solutions published in the MATHCOUNTS Problem of the Week Archive
Update 10/15/2018: We got all but the second answer correct. Due to an oversight, we did not multiply the speed of 4 nautical miles per hour by 24 hours per day, which would have yielded the correct answer of approximately 90 days. Today, 7th grader Beverly W. collaborated with me in working out these solutions. To see if our answers are correct, beginning October 8, 2018, click here to view the official solutions published in the MATHCOUNTS Problem of the Week Archive
Update 10/8/2018: We got all three answers correct. 
Mr. Ken Marciel
