If a is an even integer and b is an odd integer which of the following must be an even integer :  Choose one
A) a/b
B) ab
C) 2a+b
D) 2(a+b)
E) option A B and D
a=even = e.g 6   b= odd = e.g 3   A. even/odd for example  6/3= 
<gadget id="calculator"> 6/3</gadget>
<output>2</output>
2=even   B. even * odd = 6 * 3= 
<gadget id="calculator">6 * 3</gadget>
<output>18</output>
18= even   C. 2*even + odd = even + odd = odd   D. 2(even + odd) = 2(odd) = even   Hence option A B and D it is.
<result>E</result>
If a is an even integer and b is an odd integer which of the following must be an even integer :