Quantitative Aptitude - Arithmetic Ability Questions

If a3 + 3a2 + 9a = 1, then what is the value of a3 + (3/a)?

Find the Greatest Common Factor of 280 and 144.

If the value of √42 is approximately 6.480, then what is the approximate value of √(6/7)?

The diameters of two cylinders are in the ratio 3:2 and their volumes are equal. The ratio of their heights is

The mean of the 5 smallest numbers from a group is 15 while the mean of all the 13 members of the group taken together is 17. What is the mean of the 8 largest numbers?

7 litres mixture of milk and water contains 30% water. 3.5 litres of milk is added to this mixture. What is the percentage of water in the new mixture?

A and B together can do a piece of work in 10 days. If A can do the work in 15 days, find in how many days that B alone can do the same work. Given below are the steps involved in solving the above problem. Arrange them in sequential order.

A) One day's work of B is 1/10 - 1/15

B) One day's work of A and B is 1/10 and One day's work of A is 1/15

C) B alone can do the work in 30 days

D) One day's work of B is 1/30

A non-zero number is greater than 7 times its reciprocal by 9.3. What is the number?