What is the next number in this sequence: 39, 52, 65, 78, 91 ? Choose the correct choice
A) 107 B) 112 C) 104 D) 99 E) 109
By subtracting each number from the one after it, we can determine that the numbers are all multiples of 13. By adding 13 to the last number, you get the answer.   91 + 13= 
<gadget id="calculator">91 + 13</gadget>
<output>104</output>
104   Answer: 104
<result>C</result>
What is the next number in this sequence: 39, 52, 65, 78, 91 ?