Quantitative Aptitude - Arithmetic Ability Questions

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?

If x/y = 4/9, then what is the value of (7x2 – 19xy + 11y2)/y2 ?

∆ABC is right angled at B. If m∠A = 30°., then Sec C =?

At 30% discount the selling price of an article is Rs 1050. What is the selling price (in Rs) if the discount is 15%?

Calculate the value of 61681x61681-31681x3168130000

A train is moving at the speed of 72 km/hr. How many seconds will it take to cover a distance of 1400 m ?

If a wholesaler, sells a box of chocolates at Rs 960 he gains 20%. Now if he decides to sell it at Rs 1120, what is his profit percentage?

Cost price of 28 articles is equal to Sale price of 21 articles, then percentage of profit is