10, 16, 18, 20, 20, 21, 24, 25, Q2 (median):
Q1:
Q3:
Interquartile Range (IQR): Q3-Q1 -

Problem number 26 of the rhind papyrus says: find a quantity such that when it is added to of itself the result is a 15. the modern day equation that models this problem is x + x = 15. what is the solution to the equation? x = 10 x = 12 x = 15 x = 30