Insert the missing number
9, 12, 11, 14, 13, ..., 15	Select.
A) 12  B) 16  C) 10  D) 17  E) 18
The sequence is consider into two series..   First series(odd) starting with 9 and increasing 2 as follows.   Second series(even) starting with 12 and increasing with 2 as follows.   i.e. 9 = 9 (odd)   12 = 12(even)   9 + 2= 
<gadget id="calculator">9 + 2</gadget>
<output>11</output>
11(odd series)   12 + 2= 
<gadget id="calculator">12 + 2</gadget>
<output>14</output>
14(even series)   11 + 2= 
<gadget id="calculator">11 + 2</gadget>
<output>13</output>
13(odd series)   14 + 2= 
<gadget id="calculator">14 + 2</gadget>
<output>16</output>
16(even series)   ANSWER:16
<result>B</result>
Insert the missing number
9, 12, 11, 14, 13, ..., 15