In each of the questions, 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.
6 : 210 :: ....... : 120
$$\frac{3}{4} : \frac{5}{6} : \frac{7}{8} : .......$$
5 : 3125 :: 6 : .......
BFJ : OSW :: DJR : ......
136 : 358 :: ........ : 489
1331 : 11 :: 1728 : ...........
6FJ : 16PT :: 8HL : ......
64 : 100 :: 72 : ......
9 : 72 :: ...... : 64
Train : Driver :: Class : .........