Look at this series: 22, 21, 23, 22, 24, 23, ... What number should come next? Pick one
A) 30	B) 19	C) 25	D) 5	E) 20
In this simple alternating subtraction and addition series; 1 is subtracted, then 2 is added, and so on.   so 23+2= 
<gadget id="calculator">23+2</gadget>
<output>25</output>
25   Option 25
<result>C</result>
Look at this series: 22, 21, 23, 22, 24, 23, ... What number should come next?