Quantitative Aptitude - Arithmetic Ability Questions

Ravi sold a smartphone for Rs. 30,000. Had he offered a discount of 10% on the selling price(SP), he would have earned a profit of 35%. What is the cost price?

The marked price of a chair is 40% more than its cost price. If the chair is sold for Rs 520 after a discount of Rs 40, then what will be the profit percentage?

70% of the cost price of a article is equal to the 40% of its selling price. What is the profit or loss percentage?

In a city, 40% of the people are illiterate and 60% are poor. Among the rich, 10% are illiterate. The percentage of the illiterate poor population is

50% of a = b, then b% of 40 is the same as _________ of a.

When a discount of 20% is given on a sweater, the profit is 28%. If the discount is 14%, then the profit is

Ravi is 12 years younger than Surya. Ravi's age is 40% of the sum of his and Surya's age. What will be Surya's age 9 years hence?

If 4x = √5+ 2, then the value of x - 1/16x is