Verbal Reasoning - Mental Ability Questions

If mathematical operators '-' and '/' are interchanged, then the value of 15 x 4 ÷ 15 - 11 x 33 ÷ 98 is

Pointing to a lady, Anju says, "She is the sister of my brother's mother". How is the lady related to Anju?

Spandana is the sister of Raju. How is Raju's father's sister related to Spandana?

Introducing Reeta, Monica said, "She is the only daughter of my father's only daughter." How is Monica related to Reeta?

Some equations are solved on the basis of certain system. Find the correct answer for the unsolved equation on that basis.

5 x 4 x 3 = 70 ,
6 x 5 x 4 = 140
7 x 6 x 5 = ?

In each questions given below three statements are followed by two conclusions numbered I and II. You have to take the three given statements to be true
even if they seem to be at variance with the commonly known facts. Read the conclusions and decide which conclusion logically follows from the three given statement disregarding commonly known facts. Give answer

Statements:
Some books are papers.
No paper is magazine.
All magazines are pens.
Conclusions:
I. Some books are not magazines.
II. Some books are magazines.

Pointing towards a lady in a photograph, Sushma says, "She is the mother of my grandfather's son". How is Sushma related to the lady in the picture?

If 80&10 = -8, 50&2 = -25 and 80&16 = -5, then find the value of 20&5 = ?