The problem is that you are reversing the string a few times. The following will do: (defun base8 (n) (let ((t8 (truncate n 8)) (m8 (mod n 8))) (if (= t8 0) (list m8) (append (base8 t8) (list m8))))) EDIT Here's a solution without append, using a helper function.
So, the average weight for a healthy, human kidney is 0.26-0.30 pounds. (approx.) The average weight for a healthy, human kidney is 120-140 grams. 1 pound= 453.59237 grams. So, the average weight for a healthy, human kidney is 0.26-0.30 pounds. (approx.) The average weight for a healthy, human kidney is 120-140 grams. 1 pound= 453.59237 grams. So, the average weight for a healthy, human kidney is 0.26-0.30 pounds.
Chapter 1: Normal and Abnormal Kidney Function. The kidneys are essential organs in the body which function to remove water and waste products. They also produce important hormones such as erythropoietin, Vitamin D, and renin. The kidneys are located in the back of the abdomen, one on each side of the spinal column, at about the level of the lower ribs. The average weight of an adult human kidney is approximately one-quarter pound. Each kidney is approximately 4 inches long, 2.5 inches wide, and 1.5 inches thick.