v = [ 100 , 50 , 25 , 12.5 , 6.25 , 3.125 , 1.5625 , 0.78125 , 0.375625 , 0.1878125 , 0.09390625 , 0.046953125 ]

q = v[1] / v[0]
g = True
for n in range(2,len(v)):
    if v[n] / v[n-1] != q:
        g = False

print(g)