Math Tutoring Blog - Ken Marciel - Professional Services

Our Solution to MATHCOUNTS Problem of August 26, 2019

8/26/2019

According to the published solution:

Incorrect. By mistake, we computed the number of households with less than three people, rather than the total number of people from those households, which we would have gotten correct.
Correct
Correct
Correct

Our Solution to MATHCOUNTS Problem of August 19, 2019

8/19/2019

All three answers are correct according to the published solution.

Our Solution to MATHCOUNTS Problem of August 12, 2019

8/12/2019

According to the published solution:

Correct
Correct
Incorrect. From our final answer of 19 workers, we forgot to subtract the five workers already on site.

Our Solution to MATHCOUNTS Problem of August 5, 2019

8/5/2019

According to the published solution:

Incorrect. Our third term in the sum was a little bit off, otherwise we would have obtained the correct answer.
Incorrect. Our numerator included the 6 combinations with the two disliked flavors, times the three possible toppings. However, we did not add three for the remaining three flavors if topped with chocolate chips. Our denominator was correct.
Correct

Our Solution for MATHCOUNTS Problem of July 29, 2019

7/29/2019

According to the published solution:

Correct
We inadvertently converted half a foot (0.5 ft) to 5 inches instead of 6 inches, which would have given us the correct answer.
From the last day of school, we overcounted the number of days remaining in June by one. We also carried over our incorrect answer from part two. Otherwise, we would have calculated the correct answer.

Our Solution for MATHCOUNTS Problem of July 22, 2019

7/22/2019

Photo by Beverly W.

All three answers are correct according to the published solution.

Our Solution for MATHCOUNTS Problem of July 15, 2019

7/15/2019

Photo by Beverly W.

Photo by Beverly W.

All three answers are correct according to the published solution.

My Solution for MATHCOUNTS Problem of July 8, 2019

7/8/2019

All three answers are correct according to the published solution.

My Solution for MATHCOUNTS Problem of July 1, 2019

7/1/2019

According to the published solution:

Correct
Incorrect. I misinterpreted the problem as the number of different sequences of the last 5 fireworks out of the 15 available. Rather, those five were already determined. Therefore, instead of the number of permutations of 15 items arranged 5 at a time, the problem asks for the number of ways to arrange the remaining 10 fireworks.
Approximately correct. Overlooking the last sentence, which asks for the answer to be rounded to the nearest tenth, I instead rounded up to the nearest whole number.

My Solution for MATHCOUNTS Problem of June 24, 2019

6/24/2019

All three answers are correct according to the published solution.