What is the sum of all the prime numbers from 20 to 40?
Select:
A) 279  B) 100  C) 278  D) 120  E) 191
Explanation:   23 + 29 + 31 + 37= 
<gadget id="calculator">23 + 29 + 31 + 37</gadget>
<output>120</output>
120   Answer: 120
<result>D</result>
What is the sum of all the prime numbers from 20 to 40?