Look at this series: 0.7, 2.1, ____, 18.9, 56.7, ... What number should fill the blank?	Choose the correct choice from the following answers.
A) 6.3 B) 5.3 C) 6.2 D) 6.1 E) 4.3
This is a simple multiplication series. Each number is 3 times greater than the previous number.   6.3nswer: 6.3
<result>A</result>
Look at this series: 0.7, 2.1, ____, 18.9, 56.7, ... What number should fill the blank?