Quantitative Aptitude - Arithmetic Ability Questions

If P = 350 and Q = 600, then P is how much percentage less than Q?

What is the value of 53% of 7400?

The marked price of a book is Rs 4200. The shopkeeper gives two successive discounts of 25% and y% to the customer. If the customer pays Rs 2898 for the book, then what is the value (in percentage) of y?

What should be added to 5(2x-y) to obtain 4(2x - 3y) + 5(x + 4y)?

In ∆DEF measure of angle E is 90°. If secD = 25/7, and DE = 1.4cm, then what is the length (in cm) of side DF?

If θ be positive acute angle and 5cosθ + 12sinθ = 13, then the value of cosθ is

Dealer purchased an article for Rs. 900 and fixes the list price in such a way that he gains 20% after allowing 10% discount, then the list price is

If 31x + 31y = 403, then what is the average of x and y?