Determine the median and the first and third quartiles for 1117, 1465, 513, 437, 1038, 954, 650, 893, 456, 1018

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