For any number s, s* is defined as the greatest positive even integer less than or equal to s. What is the value of 5.2 – 5.2*? Choose the correct choice from the following answers.
A) 0.2 B) 1.2 C) 1.8 D) 2.2 E) 4.0
Since s* is defined as the greatest positive even integer less than or equal to s, then 5.2* = 4 (the greatest positive even integer less than or equal to 5.2 is 4).   Hence, 5.2 – 5.2* = 5.2 - 4= 
<gadget id="calculator">5.2 - 4</gadget>
<output>1.2</output>
1.2   Answer: 1.2.
<result>B</result>
For any number s, s* is defined as the greatest positive even integer less than or equal to s. What is the value of 5.2 – 5.2*?