Quantitative Aptitude - Arithmetic Ability Questions

 Find the volume (in cm3) of a hemisphere of diameter 42 cm.

 In a fraction when 3 is added to its numerator and denominator it becomes 4/5. And it becomes 1/2 when 2 is subtracted from both the numerator and denominator. Find the fraction.

In a triangle ABC, ∠A = 70°, ∠B = 80° and D is the incentre of ΔABC. ∠ACB = 2x° and ∠BDC = y°. The values of x and y, respectively are

Find the volume (in cm3) of a cuboid of length, breadth and height of 8.5 cm, 6 cm and 7 cm respectively.

If 60/75 is equivalent to 4/x, then the value of x is

Vishnu spends Rs. 5000 in buying 12 tables and some chairs. The cost of one table is Rs. 50 and that of one chair is Rs. 40. What is the ratio of the numbers of tables purchased?

What is the sum of all prime numbers between 60 and 80?

If the standard deviation of a population is 7, what would be the population variance?