Quantitative Aptitude - Arithmetic Ability Questions

A mixture contains liquid A and liquid B in the ratio of 5 : 4. If 2 litres of liquid B is added to it, then the ratio of liquid A and liquid B becomes 7 : 6. What is the quantity (in litres) of liquid A in the mixture?

In the following question, select the related number from the given alternatives.
 
47 : 57 : : 93 : ?

The simplification value of 735+2-552+7+227+5 is

If  x=2+32-3, then what is the value of x+1/x ?

If A alone can do a job in 40 days then, in how many days can B alone do the job if together they can do the job in 8 days?

If a3 + b 3 = 35 and ab = 6, then what is the value of a + b?

(secA - 1)/(secA + 1) is equal to?

What is the equation of the line perpendicular to the line 5x + 3y = 6 and having Y-intercept -3?