Quantitative Aptitude - Arithmetic Ability Questions

Simple interest on a certain sum of money for 3 years at 10% per annum is half the compound interest on Rs 6000 for 2 years at 10% per annum. The sum placed on simple interest is

A mobile plan costs Rs. 32 for 6 minutes. What is the approximate cost, in rupees, for 4 minutes?

If x+y+z = 0, then what is the value of x23z+y33xz+z23x ?

If a3- b3= 91 and a - b = 1, then what is the value of ab?

Findout the odd word/letters/number/number pair from the given alternatives.

At what rate of compound interest per annum will a sum of Rs 20000 become Rs 25088 in 2 years?

At what percentage above the cost price must an article be marked so as to gain 33% after allowing a customer a discount of 5%?

If  P2+1P2 = 47, then the value of P + 1P is