Quantitative Aptitude - Arithmetic Ability Questions

If 4(x+y) = 256 and (256)(x-y) = 4, then what is the value of x and y?

I gain 19% if I sell an article for Rs. 595. What would be my gain or loss percentage if I sell it for Rs. 475?

If a merchant offers a discount of 30% on the list price, then he makes a loss of 16%. What % profit or % loss will he make if he sells at a discount of 20% of the list price?

Findout the odd word/letters/number/number pair from the given alternatives.
23 : 8 : : 62 : ?

The ratio of present ages of P and Q is 8 : 5. After 4 years their ages will be in the ratio 4 : 3 respectively. What will be the ratio of P’s age after 7 years from now and Q’s age now?

A and B are positive integers. If A + B + AB = 65, then what is the difference between A and B (A, B ≤ 15)?

Determine the value of “s” for which the equation 5x + 35 = 60x + s has infinite number of solutions.

A & B together finish a job in 24 days, while A, B & C together can finish the same job in 8 days. C alone will finish the job in