MATHS. HELP ME I AM DESPERATE. LOADS OF POINTS UP FOR GRAB! The students at a school can be split into 15 equal-sized classes or 21 equal-sized classes. What is the smallest number of students that attend the school??

Will give the box plots below show the math scores of students in two different classes: class a 55 72 75 89 95 class b 55 70 75 94 100 based on the box plots, which statement is correct? a: the median score of class a is greater than the median score of class b. b: the lower quartile of class a is greater than the lower quartile of class b. c: the upper quartile of class a is greater than the upper quartile of class b. d: the maximum score of class a is greater than the maximum score of class b.