Quantitative Aptitude - Arithmetic Ability Questions

A solid has 12 vertices and 30 edges. How many faces does it have?

In Δ ABC, the median AD is 8 cm and CB is 16 cm, measure of angle CAB is_____ .

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?

The value of aa-b+bb-a is

On a certain Principal if the Simple interest for two years is Rs 4800 and Compound interest for the two years is Rs 5088, what is the rate of Interest?

Karan remembers that his sister's birthday is not after 18th August. Karan's mother remembers that Karan's sister birthday is before 20th August but after 17th August. On which date of August is Karan's sister birthday?

In a class, there were 9 boys and some girls. In a test the mean score obtained by the boys was 12 while that obtained by the girls was 14. If the overall average was 13.1, what was the total number of students in the calss?