Verbal Reasoning - Mental Ability Questions

In the following question, select the odd number from the given alternatives.

‘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?

If 6#30=5; 8#24=3; 7#28=4; then what is the value of 8#40=?

Choose the odd one from the following:

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

In a row of students, Ankit is 26th from the left end. Poonam is 18 ranks to the right of Ankit. If Poonam is 32nd from the right end, then what will be the rank of Ankit from the right end?

While introducing a boy, Raju says, "He is the son of my wife's sister." How is the boy related to Raju?

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