Verbal Reasoning - Mental Ability Questions

The following equation is incorrect. Which two signs should be interchanged to correct the equation?

26 - 2 x 30 ÷ 6 + 16 = 20

Select the missing term based on the given related pair.

The following equation is incorrect. Which two signs should be interchanged to correct the equation?

7 x 16 + 20 - 20 ÷ 10 = 31

If the mathematical operator, '+' means 'x', '/' means '-', '-' means '+', and 'x' means '/', then the value of 11 +14 x7- 5 / 29 is

If A means '+', @ means 'x', & means '/' and V means '-', then the value of

7 @ 2 V 135 & 5 @ 3 & 9 A 1

A man pointing to a photograph says, 'The lady in the photograph is my nephew's maternal grandmother." How is the lady in the photograph related to the man's sister who has no other sister ?  

What should come next in the following number series?

9 8 7 6 5 4 3 2 1 8 7 6 5 4 3 2 1 7 6 5 4 3 2 1

From the given alternatives, according to dictionary, which word will come at FOURTH position?