Which number is halfway between 1/3 and 1/2?
a. 2/12
b. 3/12
c. 5/12
d. 7/12

The correct answer is:  [C]:  " 5/12" .

Explanation: 

 Notice that all answer choices given are fractions, which are "twelfths".

 The question asks, "which number is halfway between 1/3 and 1/2 ?"

   We can convert "1/3" and "1/2" into "twelfths"; 

 1/3 = (1*4) / (3*4) = 4/12 ;

 1/2 = (1*6) / (2*6) = 6/12 ;

 So, what number is halfway between:  4/12   and  6/12?  

The answer is: "5/12" ;  which is: Answer choice: [C].

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Ais less than or equal to -5