Quantitative Aptitude - Arithmetic Ability Questions

The simple interest on a sum of money for 10 years is Rs 3130. If the principal becomes 5 times after 5 years, then what will be the total interest (in Rs)obtained after 10 years?

In the following question, select the odd word pair from the given alternatives.

If 23x + 23y = 184, then what is the average of x and y?

What number should be added to each of the numbers 35, 115, 53 and 165, so that the resulting numbers are in continued proportion?

What is the ratio of simple interest earned on certain amount at the rate of 12% p.a. for 9 years and that for 12 years?

A and B can complete a task in 12 days. However, A had to leave a few days before the task was completed and hence it took 16 days in all to complete the task. If A alone could complete the work in 21 days, how many days before the work getting over did A leave?

The ratio of the cost price and selling price of a bulb is 15 : 18. What is the profit percentage?

If 5x = 30-y = 6z, then what is the value of (xy + yz + zx)/xyz?