Quantitative Aptitude - Arithmetic Ability Questions

If medians of a triangle have lengths 18 cm, 24 cm and 30 cm, then what is the area (in sq.cm) of the triangle?

A shopkeeper marks the price of his table 30% above the cost price. He allows his customers a discount of 12% on the marked price. What is the profit percentage?

Mehdi can complete a work in 25 hours. If he is joined by Jahnavi who is 50% more efficient, in what time will they together finish the work?

If a - b = 4 and ab = -3, then what is the value of a3- b3?

What is the value of Cot 45°+ 1/3 Cosec 60°?

There is a 4% increase in volume when a liquid freezes to its solid state. The percentage decrease when solid melts to liquid again, is

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

If a+b+c = 0, then (a^3 + b^3 + c^3)^2 = ?