Quantitative Aptitude - Arithmetic Ability Questions

If 21% of an electricity bill is discounted, Rs 1817 is still to be paid. How much was the original bill amount?

Marked price of an item is Rs 500. On purchase of 2 items discount is 8%, on purchase of 3 items discount is 16%. Radha buys 5 items, what is the effective discount?

If the edge of a cube is increased by 10%, then what will be the percentage increase in its volume ?

The diagonal of a square equals the side of an equilateral triangle. If the area of the square is 6√3 sq cm, what is the area of the equilateral triangle?

If p/q = (x+3)/(x-3), then what is the value of p2+q2p2-q2 ?

If a = 73, b = 74 and c = 75, then what is the value of a3 + b3 + c3 – 3abc?

If 1/3(12x/5 - 1/2) + 6/5 = 7/6, then what is the value of x?

20% discount is offered on an item. By applying a promo code the customer wins 15% cash back. What is the effective discount?