Quantitative Aptitude - Arithmetic Ability Questions

A shopkeeper increases the price of an object by 40% and then sells it at 25% discount on the marked price. If the selling price of such an object be Rs. 2100, its cost price for the shopkeeper was ?

The price of an article is cut by 7%, to restore it to its original value, the new price must be increased by

In a bag the ratio of red balls to green balls is 4 : 9. If 6 more green balls were added to the bag, the ratio of red balls to green balls would become 1 : 3. How many red balls are there in the bag?

Simplify : -21973 × -1253 ÷ 275123

P does half as much work as Q in 1/3 of the time. If together they take 15 days to complete a work, how many days will P take to do it alone?

The ratio of present ages of Rambha and Sarvesh is 8:5. After 7 years the ratio of their ages will be 5:4. What is Rambha's present age?

If 5/2 - (6/5)(x - 15/2) = -x/5, then what is the value of x?

The price of an article is discounted by 25%, to restore to its original value, the new price must be increased by