Sharmeeka is putting all of her pens in order by number. One has the number 4 on it, the next has number 8, the next has number 12, and the next has number 16.
What number will the next pen have on it?
Pick one
A) 20 B) 25 C) 32 D) 22 E) 24
A) 20, because the pens are ordered by multiples of 4.   4 +4= 
<gadget id="calculator">4 +4</gadget>
<output>8</output>
8   8 + 4= 
<gadget id="calculator">8 + 4</gadget>
<output>12</output>
12   12+4= 
<gadget id="calculator">12+4</gadget>
<output>16</output>
16   16+4= 
<gadget id="calculator">16+4</gadget>
<output>20</output>
20
<result>A</result>
Sharmeeka is putting all of her pens in order by number. One has the number 4 on it, the next has number 8, the next has number 12, and the next has number 16.
What number will the next pen have on it?