Posted by **afo** on Friday, December 4, 2009 at 1:12pm.

2. Mrs. young has her 18 students seated in a circle. They are evenly

spaced and numbered in order. which student is directly opposite these three students?

.student#1?

.student#5?

.student#18?

- math -
**drwls**, Friday, December 4, 2009 at 2:02pm
Draw a picture and figure it out. Put students at 20 degree increments around the circle. The largest number minus the smallest, across from each other, must equal 9.

- math -
**Anonymous**, Friday, December 4, 2009 at 8:55pm
#1=9

#5=12

#18=8

- math -
**tchrwill**, Saturday, December 5, 2009 at 10:54am
Just another thought.

N = number of students equally spaced around the circle and numbered sequentially.

The student number opposite a given student number is defined by Sopp = Sg +/- N/2 depending on whether the given student number is less/more tan N/2.

The student opposite student #1 = 1 + 18/2 = #10.

The student opposite student #5 = 5 + 18/2 = #14.

The student opposite student #18 is 18 -- 18/2 = 9.

- math -
**lexi**, Wednesday, March 3, 2010 at 5:01pm
vnidsjvnbsdifb wsgyswrgywerygwb GYw

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