Verbal Reasoning - Mental Ability Questions

If -2@-4 = -8, -1@-8 = -8 and -1@6 = 6, then find the value of -1@7 = ?

Square is related to Line in the same way as Cube is related to

What will come in place of the question mark (?) in the following number series?14, 18, 9, 25, 0, ?

In the following question, which one set of letters when sequentially placed at the gaps in the given letter series shall complete it?
a _ bc _ a _ bcdabc _ da _ cd _

A series is given with one term missing. Choose the correct alternative from the given ones that will complete the series.
I, V, ? , L

Arrange the given words in the sequence in which they occur in the dictionary.
i. Cover
ii. Clandestine
iii. Coward
iv. Cajole

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

Herringbone

While posing for a family photo, the father is standing to the right of the son and left of the grandmother. The mother is sitting to the left of her daughter and right of the grandmother. Who is seated in the middle?