What number is missing in this sequence? 1; 13; 27; ?; 53; 65; 79 - with Answer

What number is missing in this sequence? 1; 13; 27; ?; 53; 65; 79

Answer:
Answer is 39

Explanation
The above sequence has its terms increasing by 12 and 14 alternately, so
1 + 12 = 13
13 + 14 = 27
27 + 12 = 39
39 + 14 = 53
53 + 12 = 65
65 + 14 = 79