Verbal Reasoning - Mental Ability Questions

If '+' means '-', '-' means 'x', 'x' means '/', '/' means '+', then 15 - 3 +10 x 5 / 5 =

In the following question, which one set of letters when sequentially placed at the gaps in the given letter series shall complete it?

c_e_cd_f_de_

If ∆○ = 52, □# = 43. What is #∆□ = ?

In the following question, select the number which can be placed at the sign of ? from the given alternatives.

Select the missing number from the given options.

In the following question, from the given alternative words, select the word which cannot be formed using the letters of the given word.
ABSOLUTE

From the given alternative words, select the word which cannot be formed using the letters of the given word:
ECCENTRICITY

What is total number of triangles in the given figure?