What does a "hash" represent in the context of

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

24 : 126 :: 48 : ?

Select the number combination of letters that when placed sequentially in the blanks of the given series will complete the series.

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

ORGANS : SNTZRO : : PARROT : ?

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

B _ M _ V B Q M _ V _ _ _ F V

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

BSTN: AQUP :: DNUC : ?

Select the set in which the numbers are related in the same way as the numbers of the given set.

Select the set of numbers that is similar to the following set:

(23, 7, 24)

In the following question, select the related word from the given alternatives.

BURIED : SNGCZX :: LEGAL : ?