Look at this series: 0.7, 2.1, ____, 18.9, 56.7, ... What number should fill the blank?
Options:
(A) 6.3
(B) 5.3
(C) 6.2
(D) 6.1
(E) 4.3 Now, let's think a bit. Some random thoughts:
This is a simple multiplication series. Each number is 3 times greater than the previous number.
The final answer: (A).