If a is an odd integer and b is an even integer which of the following must be an integer : Options: A) a/b B) ab C) 2a+b D) 2(a+b) E) option B C and D
a= odd = e.g 3   b=even = e.g 6   A. odd/even for example   3/6= 
<gadget id="calculator">  3/6</gadget>
<output>1/2 = around 0.5</output>
0.5 no even no odd   B. odd * even= 3 * 6= 
<gadget id="calculator">3 * 6</gadget>
<output>18</output>
18 even   C. 2*odd + even= even + even even   D. 2(even + odd) = 2(odd) even   Hence option B C and D it is.
<result>E</result>
If a is an odd integer and b is an even integer which of the following must be an integer :