Quantitative Aptitude - Arithmetic Ability Questions

The brother is elder to his sister by 6 years. Seven years ago the product of their ages was 72. What is the age of the brother?

15% of a number, when added to 30% of another, gives 24% of the sum of the two numbers. The bigger number is 4 more than the smaller one. What are the numbers?

In triangle PQR, C is the centroid. PQ = 30 cm, QR = 36 cm and PR = 50 cm. If D is the midpoint of QR, then what is the length (in cm) of CD?

If a number is decreased by 10%, it becomes 54. To make it 72, it should be increased by

The marked price of an article is 40% more than its cost price. If 15% discount is given on the marked price, then what will be the profit percentage?

A used two-wheeler dealer sells a scooter for Rs 46,000 and makes some loss. If he had sold it for Rs 58,000 his profit would have been double his loss. What was the cost price (in Rs) of the scooter?

What is the remainder when 6910 is divided by 81?

After a discount of 23% an article is sold for Rs 1848. What is the marked price (in Rs) of the article?