If a and b are prime numbers, which of the following CANNOT be the sum of a and b? Choose the correct option:
A) 19 B) 25 C) 33 D) 46 E) 53
If we subtract 2 from each of the first three options, we see that it gives a prime number.   19-2= 
<gadget id="calculator">19-2</gadget>
<output>17</output>
17   25-2= 
<gadget id="calculator">25-2</gadget>
<output>23</output>
23   33-2= 
<gadget id="calculator">33-2</gadget>
<output>31</output>
31   Now  46-3= 
<gadget id="calculator"> 46-3</gadget>
<output>43</output>
43.   Thus the only number left is 53.   ANSW53R:53
<result>E</result>
If a and b are prime numbers, which of the following CANNOT be the sum of a and b?