Quantitative Aptitude - Arithmetic Ability Questions

30% discount is offered on an item. By applying a promo code the customer wins 5% cash back. What is the effective discount?

If a(a + b + c) = 45, b(a + b + c) = 75 and c(a + b + c) = 105, then what is the value of (a2 + b2 + c2 )?

If ab+ba = -1, then the value of a2b-b2a is

What is the value of [1 – sin (90 – 2A)] / [1 + sin (90 + 2A)]?

How many times in a week does both the hands of the clock will coincide with each other?

Area of 4 walls of a cuboid is 448 sq cm, its length is 18 cm and height is 8 cm. What is its breadth (in cm)?

The tops of two poles of height 60 metres and 35 metres are connected by a rope. If the rope makes an angle with the horizontal whose tangent is 5/9 metres, then what is the distance (in metres) between the two poles?

If 35% of (x + y) = 40% of (x – y), then x is what percentage of y?