Hi there-
Below is a 600-700 level question I missed during a practice test. I reviewed the solution provided and understand it. However, it seems impossible to work through all the algebra shown in the solution in less than 2 mins. Does anyone have any suggestions on a faster way to approach this? Or is there no way around all the time consuming algebra?
thanks!
At Jefferson Elementary School, the number of teachers and students (kindergarten through sixth grade) totals 510. The ratio of students to teachers is 16 to 1. Kindergarten students make up 1/5 of the student population and fifth and sixth graders account for 1/3 of the remainder. Students in first and second grades account for 1/4 of all the students. If there are an equal number of students in the third and fourth grades, then the number of students in third grade is how many greater or fewer than the number of students in kindergarten?
12 greater
17 fewer
28 fewer
36 fewer
44 fewer
Answer = 28 fewer
Below is a 600-700 level question I missed during a practice test. I reviewed the solution provided and understand it. However, it seems impossible to work through all the algebra shown in the solution in less than 2 mins. Does anyone have any suggestions on a faster way to approach this? Or is there no way around all the time consuming algebra?
thanks!
At Jefferson Elementary School, the number of teachers and students (kindergarten through sixth grade) totals 510. The ratio of students to teachers is 16 to 1. Kindergarten students make up 1/5 of the student population and fifth and sixth graders account for 1/3 of the remainder. Students in first and second grades account for 1/4 of all the students. If there are an equal number of students in the third and fourth grades, then the number of students in third grade is how many greater or fewer than the number of students in kindergarten?
12 greater
17 fewer
28 fewer
36 fewer
44 fewer
Answer = 28 fewer
