A sequence of numbers or letters that follow a definite pattern is given. Each question has a blank space. This has to be filled by the correct answer from the four given options to complete the sequence without breaking the pattern.
3Z2A, 5X5C, 7V8E, --------
Z7A, Y6B, X5C, -------, U3E
$$\sqrt{1 + \sqrt{15}}, \sqrt{3 + \sqrt{13}}, ------------, \sqrt{10}$$
UGX : AND :: QLN : -----
---- : HDGF :: FILM : ADGH
KEGV, JDFU, ICET, --------
DIVIDEND : CHUHCDMC :: KEYBOARD : -------
13, 28, 49, 76, -----, 148
2, 26, 242, -------
$$\frac{2}{3}, \frac{8}{9}, \frac{26}{27}, \frac{80}{81}, --------, \frac{728}{729}$$