Verbal Reasoning - Mental Ability Questions

Select the related word/letters/number from the given alternatives.
30 : 16 :: 24 : ?

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

hello, lower, error, organ, tense, ?

Which of the following interchanges in signs and numbers will make the given equation correct?
7 x 9 + 5 = 68

If "S" denotes "multiplied by", "V" denotes "subtracted from", "M" denotes "added to" and "L" denotes "divided by", then

5 V 9 M 63 L 9 S 7 = ?

In a certain code language, '÷' represents '+', '-' represents 'x', '+' represents '÷' and 'x' represents '-'. Find out the answer to the following question.

9 ÷ 16 - 25 + 10 x 20 = ?

Some books are arranged one above the other. If a book is at 18th position from the top and 5th position from bottom then the total number of books is

If 14 % 32 = 46, 52 % 20 = 72 then what is the value of 35 % 14 = ?

In a certain code language, “LUNGS” is written as “OWQIV”. How is “HEART” written in that code language?