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.
On average, a kidney weighs approximately 150 to 160 grams and, together, both kidneys weigh about 0.5 percent of total body weight. Usually, the left kidney is slightly larger than the right. These measurements and weights represent the typical ranges of a healthy, adult human kidney.
According to ob-gyn Dr. Deborah Wilson, the size of the human uterus varies. However, she does stipulate that the organ generally weighs between 0.06 and 0.22 pounds. Dr. Wilson adds that the uteruses in women who have not given birth are generally smaller in size than in those who have. Continue Reading.