Look at this series: 1.5, 2.3, 3.1, 3.9, ... What number should come next?	Choose the correct choice from the following answers:  A) 4.2  B) 4.4  C) 4.7  D) 5.1  E) None
Explanation: In this simple addition series, each number increases by 0.8.   Answer: Option 4.7
<result>C</result>
Look at this series: 1.5, 2.3, 3.1, 3.9, ... What number should come next?