Verbal Reasoning - Mental Ability Questions

In the following question, select the related word from the given alternatives.
Mathematics : Formulas : : Chemistry : ?

Determine the value of ? $$\begin{gathered} 1-121-131-14.........1-1n-? \\ \end{gathered}$$

In a certain code, if MIZZLY is written as ZIMYLZ and PUZZLE is written as ZUPELZ, then what will BUZZWORD be written as in the same code?

If EFMIJ means DELHI, then the last letter of the word got by decoding IQBOS is

If 19 (36) 13 and 37 (81) 28, then what is the value of 'A' in 43 (A) 38?

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

8, 27, 125, 343, ?

How many such pairs of letters are there in the word REGIONAL, each of which has as many letters between them in the word (in both forward and backward directions) as they have between them in the English alphabetical series ?

After interchanging + & x and 12 &18, which of the following equations will hold true?