Verbal Reasoning - Mental Ability Questions

From the given words, select the word which cannot be formed using the letters of the given word.
HUMBLING

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

17 x 18 ÷ 30 - 20 + 14 = ?

Which set of letters when sequentially placed at the gaps in the given letter series shall complete it?

s_r_t_s_r

In the following question, select the related number from the given alternatives.
5 : 130 : : 6 : ?

If "A" means "plus", "B" means "divide", "C" means "multiply" and "D" means "minus", then 187 B 17 C 4 A 7 D 17 = ?

In the following question, select the related number from the given alternatives.
4 : 17 : : 7 : ?

Hitesh, Sunny, Vicky, Nitin and Bharat are arranged in ascending order of the height from the top. Hitesh is at third place. Bharat is between Nitin andHitesh while Nitin is not at the bottom. Who has the maximum height among them?

If 14 (16) 18 and 33 (64) 25, then what is the value of ‘A’ in 25 (49) A?