Answer
34380 years
Work Step by Step
Given the skull's C-14 content = 1.563 % of that found in living organisms.
We know C-14 content after N lives= $x/ 2^N$
So,as per the given data, $(1/2^N)x100 = 1.563$
2^N = 100/1.563
N=6
So, age of skull should be 6 x 5730 years= 34380 years