The sum of the non-prime numbers between 60 and 70, non-inclusive, is	Select:
A) 387	B) 429	C) 457	D) 499	E) 536
sum of consecutive integers from 61 to 69, inclusive ====&gt; (A1 + An)/2 * # of terms = (61 + 69)/2 * 9 = 65 *9= 
<gadget id="calculator">65 *9</gadget>
<output>585</output>
585   sum of non-prime numbers b/w 60 and 70, non inclusive===&gt; 585 - 128 (i.e., 61 + 67, being the prime #s in the range) =457   Answer: 457
<result>C</result>
The sum of the non-prime numbers between 60 and 70, non-inclusive, is