Math (Combinatorics)
posted by Shin .
40 students attended the brilliant summer camp at Stanford University. "k" of the students at the camp are working on math problems and the others are working on nonmath problems. One of the camp mentors noticed that whenever all the students were partitioned into 2 or more groups of equal size, they could never have the same number of math students in every group. How many different values could "k" have?

16

Two thin and identical steel rods move with equal speeds v=1 m/s in opposite directions and collide longitudinally.The collision is perfectly elastic and the rods swap their velocities. How long does the collision last in seconds if the length of the rods is l=30 cm. Assume that the speed of sound in the steel rods is c=5000 m/s?
Respond to this Question
Similar Questions

math
every summer, each student organization at your school sends 2 students to summer camp. the teacher mentor randomly selects the students (pulls from a hat) the club has 10 students among the students is a set of twins. what is the … 
math
Fewer than 107 girls attend a basketball camp. A total of 180 children attend at the camp. Which inequality can be used to find the number of boys n tha might have attended the basketball camp? 
Math
Out of 18 students at dance camp, 6 are boys. What is the ratio of girls to students at the dance camp, in simplest form. 
math
At a school camp, 30% of the students were boys. When 87 students left the camp after the second day, half the original number of boys were left behind, and the number of girls decreased by 20%. How many girls were at the camp in the … 
math
At a school camp, 30% of the students were boys. When 87 students left the camp after the second day, half the original number of boys were left behind, and the number of girls decreased by 20%. How many girls were at the camp in the … 
math
At a school camp, 30% of the students were boys. When 87 students left the camp after the second day, half the original number of boys were left behind and the number of girls decreased by 20%. How many girls were at the camp in the … 
Math
A group of 54 randomly selected students from one school district participated in a survey. Out of the 54 students in the survey, 9 are enrolled in band camp. If there are a total of 1,200 students in the school district, which estimate … 
math
In a school 1/6th of the girls and 1/7th of the boys took part in a camp.what fraction of the total number of students took part in the camp? 
Math
A total of 130 children attended a basketball camp. Of these, fewer than 87 were girls. Which inequality can be used to find n, the number of boys that might have attended camp? 
math
Jasmine is looking at a map to determine how many miles it is to the camp she will be attending this summer. The scale of the map is 14 inch = 20 miles. The total distance to the camp on the map is 2.75 inches. Which proportion shows …