Quantitative Aptitude - Arithmetic Ability Questions

If xa+b+1=xa-b+a-ba+b, then x is equal to

If the selling price is Rs 728 after getting a discount of 9%, what was the marked price?

10% discount is offered on an item. By applying a promo code the customer wins 5% cash back. What is the effective discount?

A rectangular swimming pool of length 20 m and breadth 10 m has a uniformly sloping floor. It is 1 m in depth on one end of its length and 3 m at the other. How much water is needed to completely fill this pool? (Take π = 22/7)

What will be the net discount percentage of three successive discounts of 20%, 10% and 30%?

If x + 1/x = √13, then 3x(x2-1) equal to

Seven years ago, the average age of A, B and C was 51 years. If A is 3 years older than B and B is 3 years older then C then the present ages of A, B and C are ( in year)

Ajay can do a painting in 12 days. Amit is 70% more efficient than Ajay. What is the number of days Amit would need to finish the same painting?