Quantitative Aptitude - Arithmetic Ability Questions

The volume of a spherical balloon is increased by 700%. What is the percentage increase in its surface area?

A person sells wheat at a profit of 30%. If he reduces its selling price by Rs 60, then he suffers a loss of 10%. What was the initial selling price (in Rs)of the wheat?

If a person walks at 12 km/hr instead of 10 km/hr, he would have walked 1 km more in the same time. What is the actual distance (in kms) travelled by him at 10 km/hr in the same time?

Two students appeared for an examination. One of them secured 20 marks more than the other and his marks were 55% of the sum of their marks. The marks obtained by them are

A fraction becomes 6/5 when 5 is added to its numerator and becomes 1/2 when 4 is added to its denominator. What will be the value of the fraction?

If the selling price of an item is Rs 1000 after getting a discount of 20%, then what was the marked price (in Rs)?

Value of (4a2+ 12ab + 9b2)/(2a + 3b) is

If 15% of x is three times of 10% of y, then x:y =