Quantitative Aptitude - Arithmetic Ability Questions

The sum of the ages of father and a son presently is 70 years. After 10 years, the son's age is exactly half that of the father. What are their ages now?

Cost price of a refrigerator is Rs 13400. If loss percentage is 4%, then what is the selling price (in Rs) of the refrigerator?

At what rate of compound interest per annum will a sum of Rs 10000 become Rs 12321 in 2 years?

If 35% are the passing marks. A student gets 200 marks yet fails by 24 marks. What is the maximum marks?

For what value of k, the expression x6– 18x3 + k will be a perfect square?

The average age of 24 students is 12 years. It was observed that while calculating the average age, the age of a student was taken as 14 years instead of 8 years. What will be the correct average age (in years)?

The marked price of an article is 10/7 of the cost price and the selling price of that article is 4/5 of the marked price. What is the profit percentage?

A bank offers 5% compound interest per half year. A customer deposits Rs. 3200 each on 1st January and 1st July of a year. At the end of the year, the amount he would have gained by way of interest is: