A series is given with one term missing. Choose the correct option from the given ones that will complete the series.

50 : 70 ::..?.... 90

Which of the following numbers will replace the question mark (?) in the given series?
 382, 322, 272, 232, 202, ?

A series is given with one term missing. Choose the correct alternative from the given ones that will complete the series.

? , Hexane, Heptane, Octane

Which number from the options will replace the question mark (?) in the following series?
 3, 13, 53, 213, ?

Which of the following numbers will replace the question mark (?) in the given series?
 8, 16,13, ?, 47, 282

Select the option that will fill in the blank and complete the given series.
CDZ, DGE, EJJ, FMO, GPT___

Select the letter-cluster from among the given options that can replace the question mark (?) in the following series.
TOM, UMP, VKS, ?, XGY

A series is given with one term missing. Choose the correct option from the given ones that will complete the series.

2 : 7 : 4 : 9 : ?