Quantitative Aptitude - Arithmetic Ability Questions

In a class of 65 students there are 39 girls. The average weight of these girls is 60 Kg and average weight of the full class is 64 kgs. What is the average weight of the boys of the class?

O is the circumcentre of ΔABC. If AO = 8 cm, then the length of BO is

A bag has Rs 20 in the form of 1­-rupee, 50­-paise and 10­-paise coins in the ratio of 2:3:5. Find the number of 50­-paise coins.

A dealer marks his goods 20% above their cost prices. Then,he allows such a discount on the marked price so that he makes a profit of 8%. The rate of discount is:

If 35% of (x + y) = 40% of (x – y), then x is what percentage of y?

If 21% of an electricity bill is discounted, Rs 1817 is still to be paid. How much was the original bill amount?

Area of 4 walls of a cuboid is 448 sq cm, its length is 18 cm and height is 8 cm. What is its breadth (in cm)?

The price of rice has increased by 60%. In order to restore the original price, the new price must be reduced by