Quantitative Aptitude - Arithmetic Ability Questions

If a - b = -1 and ab = 6, then what is the value of a3- b3?

The ratio of two numbers is 5 : 6. If their product is 1470, then what is the sum of both the numbers?

30% of a number exceeds 25% of the same number by 27. What is the value of the number?

The length of a side of an equilateral triangle is 8 cm. The area of the region lying between the circum circle and the incircle of the triangle is (use: π = 22/7)

If the shopkeeper sells an item at Rs 1250 which is marked as Rs 1500, then what is the discount he is offering?

If cos 21° = x/y, then cosec 21° -­ cos 69° is equal to

If (333 + 333 + 333) (233 + 233) = 6x, then what is the value of x?

If the side of a square is increased by 20%, then what will be the percentage increase in its perimeter?