Quantitative Aptitude - Arithmetic Ability Questions

Find the total surface area (in cm²) of a right circular cone of diameter 14 cm and slant height 10 cm.

If the cost price of 20 books is the same as selling price of 25 books, then the loss percentage is

The simple interest on a sum for 5 years is two­fifth of the sum. The rate of interest per annum is

In an isosceles triangle ABC, AB = AC and ∠A = 80°. The bisector of ∠B and ∠C meet at D. The ∠BDC is equal to

 In ΔDEF measure of angle E is 90 deg. If tanD = 4/3, and DE = 6cm, then what is the length (in cm) of side EF?

4 years ago, the ratio of Vikah's to Rahul's age was 3:5. After 6 years, this ratio would become 4:5. Find present age of Rahul.

In a number system, on dividing 11509 by a certain number, Mukesh gets 71 as quotient and 7 as remainder. What is the divisor?

If the radius (r) of a circle is increased by 'x' units, what is the number of units by which the circumstance of the circle is increased?