Verbal Reasoning - Mental Ability Questions

If 8α9 = -72, -9α3 = 27 and -6α1 = 6, then find the value of -3α6 = ?

In a row of boys, Amit is ranked 12th from top and Ratan is 15th from bottom. They interchange their position. Ratan now becomes 37th from bottom. How many total boys are there in the row?

Select the related word/letters/number from the given alternatives. 456 : 15 :: 789 : ?

If 9x3=3; 15x3=5; 60x5=12; then what is the value of 27x3 = ?

Select the related word/letters/number from the given alternatives. E : V : : D : ?

In the following question, select the related letters from the given alternatives.
ELQZ : AJOV : : VXTD : ?

In the following series, one letter is missing as shown by the ?. Select the missing letter from the given options.

Q, N, K, H, ?

‘R + S’ means ‘R is mother of S’, ‘R – S’ means ‘R is wife of S’, ‘R × S’ means ‘R is son of S’ and ‘R ÷ S’ means ‘R is father of S’. Which of the followingrepresents K as the grandson of T?