Quantitative Aptitude - Arithmetic Ability Questions

Value of (4a2+ 12ab + 9b2)/(2a + 3b) is

If the selling price of an item is Rs 1000 after getting a discount of 20%, then what was the marked price (in Rs)?

When a number is increased by 216, it becomes 140% of itself. What is the number?

What approximate value should come in place of the question mark (?) in the following questions? (You are not expected to calculate the exact value.)

21.003 × 39.998 –209.91 = 126× ?

If  tan2θ + cot2θ = 2, then what is the value of 2sec θ cosec θ?

In what ratio should coffee powder costing Rs 2500/kg be mixed with coffee powder costing Rs 1500/kg so that the cost of the mixture is Rs 2250/kg?

If selling price of 39 articles is equal to the cost price of 42 articles, then what will be the profit percentage?

The average age of 6 members of a family is 20 years. If the age of the servant is included, then the average age increase by 25%. What is the age (in years) of the servant?