Quantitative Aptitude - Arithmetic Ability Questions

A shopkeeper marks up his wares by 80% and offers 20% discount. What will be the selling price (in Rs) if the cost price is Rs 450?

When a discount of 20% is given on a lunch buffet, the profit is 42%. If the discount is 15%, then the profit is

The average age of a class of 6 girls is x years. Four new girls having ages x – 2, x + 2, x + 4 and x + 6 joins the class. What is the new average age (in years) of the class?

What is the area (in sq cm) of a rectangle of perimeter 90 cm and breadth 20 cm?

Three categories of employees get wages in the ratio of 1 : 2 : 3. If they get increments of 5%, 10% and 15% respectively, what will be the new ratio of their wages?

What is the value of (1/√2) Cot 45° + (1/√3) Cosec 60°?

What is the least number of complete years in which a sum of money put out at 40% annual compound interest will be more than trebled?

∆XYZ is right angled at Y. If tanX = 24/7, then what is the value of cotZ ?