Choose the word with correct

Select the option that is related to the third term in the same way as the second term is related to first term.

FINANCIAL : EIIAIAIAI :: DEMONSTRATION: ?

Which word will best complete the relationship given below?

Hygrometer : Humidity :: Barometer : ?

Select the combination of letter when placed sequentially in the blanks of the given series will complete the series.

L E __ P L E __ __ __ E A P L E __ P

If 89 # 97 = 135 and 68 # 86 = 96, then 88 # 89 = ?

Select the option that is related to third number-cluster in the same way first number cluster is related to second number-cluster.

If 49 @3 = 58 and 44 @ 13 = 213, then 52 @ 5 = ?

27 : 36 : : 42 : ?