Question

What is the r value of the following geometric sequence? 40, 20, 10, 5,…

Answer 1

It seems to be Half of the number]again and again. Half of 40 is 20 half of 20 is 10 half of 10 is 5 and half of that is 2.5 then 1.25 and so on

Answer 2

r=Asub2/Asub1
=20/40
=½