Quantitative Aptitude - Arithmetic Ability Questions

If A is equal to 20% of B and B is equal to 25% of C; then what percent of C is equal to A?

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

A fraction is greater than its reciprocal by (72)/(77). What is the fraction?

Average of 14 numbers is 32. If the average of last 5 numbers is 26, then what is the average of the remaining numbers?

A mixture of 50 kg of cement and gravel contains 10% of gravel. How many kg of gravel must be added to make the gravel content 28% in the new mixture?

A vendor buys 12 bananas for Rs 60 and sells 5 bananas for Rs 32. What will be his gain (in %)?

Selling price of a calculator is Rs 13924 and profit percentage is 18%. If selling price is Rs 10266, then what will be the loss percentage?

a and b are irrational numbers such that a+b = q is a rational number; then a­b is