Quantitative Aptitude - Arithmetic Ability Questions

The curved surface area and the slant height of a right circular cone are 99 sq.cm and 9 cm respectively. Find its diameter (in cm)

25% discount is offered on an item. By applying a promo code a customer wins 10% cash back. What is the effective discount?

A discount series of 15%, 20% and 25% is equal to the single discount of?

In 250 litres mixture of soda and water the ratio of amount of soda to that of water is 7 : 18. In order to make this ratio 2 : 3, how many more litres of soda should be added?

In a committee there are 15 members. If two members whose ages are 45 years and 55 years are replaced by the two new members, then average age of 15 members is increased by 2 years. What is the average age (in years) of the new members?

Which of the numbers given below is the square root of 14161?

If 1-aa3+9 = 19 - a1-a3, then what is the value of a?

Assuming that the numbers in each of the following figures follow a similar pattern, select the option that can replace the question mark (?) in figure C.