Quantitative Aptitude - Arithmetic Ability Questions

25% discount is offered on an item. By applying a promo code a customer wins 10% cash back. What is the effective discount?

The diameter of a circle is equal to the side of the square. What is the area of the square if the area of the circle is 64π sq cm?

If A : B = 1 : 4 and B : C = 2 : 3, then what is A : B : C?

If a + b + c = 11 and ab + bc + ca = 17, then what is the value of a3 + b3 + c3 – 3abc?

If x - 1/x = 1 then what is the value of 1x1x-1-1x+1+1x2+1-1x2-1?

If cot2A = x, then x is

If x - y = -6 and x + y = 16, then x2- y2 is?

Ticket for an adult is Rs 2200 and a child is Rs 990. One child goes free with two adults. If a group has 23 adults and 11 children, what is the discount the group gets?