Quantitative Aptitude - Arithmetic Ability Questions

Rs. x invested at 9% simple interest per annum for 5 years yields the same interest as that on Rs. y invested at 6.25% simple interest per annum for 8 years. Find x:y.

If Rajan purchase 21 pens for Rs 20 and sell all the pens at the rate of 20 pens for Rs 21, then what will be the profit percentage?

The marked price of an article is Rs 1200 and retailer gets a discount of 25%. If he sells that article for Rs 1200, then what is the profit percentage of retailer?

In a triangle ABC, OB and OC are the bisectors of angles ∠ B and ∠C respectively. ∠BAC = 60°. Then the angle ∠BOC will be

If x + [1/(x + 7)] = 0, then what is the value of x – [1/(x + 7)]?

A shopkeeper offers the following 3 schemes. Which scheme has the lowest discount percentage (all articles have same marked price)?

I. Two successive discounts of 10% and 10%

II. Buy 7 get 8

III. Buy 9 get 1 free

The LCM of two numbers is 66. The numbers are in the ratio 2:3. The sum of the numbers is

Simplify : 132 - 142 + 172 - 250 = ?