Quantitative Aptitude - Arithmetic Ability Questions

Find the value of 'y' if y84 = 225

A defective piece of article which costs Rs. 1200 is being sold at a loss of 15%. If the price is further reduced by 5%, find the S.P?

If 3+12=x+3y, then the x+y is 

The length of one side and the diagonal of a rectangle are 7 cm and 25 cm respectively. Find its area (in cm²)

To cover a distance of 144 km in 3.2 hours what should be the average speed of the car in meters/second?

B is thrice as efficient as A and C is 0.75 times as efficient as A. What is the ratio of number of days taken by A, B and C when they work individually?

A shopkeeper sells wheat at a profit of 20% and for weighing uses a weight which is 10% less than the actual weight. What is his total profit percentage?

What is the value of xy if x - y = 3 and x2+y2=15?