Quantitative Aptitude - Arithmetic Ability Questions

Marked price of an item is Rs 200. On purchase of 1 item discount is 22%, on purchase of 4 items discount is 33%. Rabia buys 5 items, what is the effective discount?

At 10% discount the selling price of a toaster is Rs 18000, what is the selling price if the discount is 37.5%?

The compound interest earned in two years at 8% per annum is Rs 4160. What is the sum (in Rs) invested?

On decreasing the price of a fan by 40%, its sales increases by 50%. What will be the percentage increase or decrease in its revenue?

A number is decreased by 10% and the resulting number is again decreased by 20%. What is the final percentage of decrease?

If A = 30°, B = 60° and C = 135°, then what is the value of sin3A + cos3B + tan3C – 3sin A cos B tan C?

In the fig. ∆ABC is inscribed in a circle with centre O. If ∠ABC = 30° then ∠ACB is equal to

A solid cone of height 24 cm and radius of its base 8 cm is melted to form a solid cylinder of radius 6 cm and height 6 cm. In the whole process what
percent of material is wasted?