Quantitative Aptitude - Arithmetic Ability Questions

The average marks in science subject of a class of 20 students is 68. If the marks of two students were misread as 48 and 65 of the actual marks 72 and 61 respectively, then what would be the correct average?

If x + 1/x = 6, then value of x2 + 1/x2 is

If secθ = cosecq with 0° < θ , q < 90°, then the value of sin (θ + q) is

Calculate the value of 61681 x 61681 - 31681 x 3168130000?

The height of an equilateral triangle is 18 cm. Its area is

If the simple interest on Rs. 400 for 10 years is Rs. 280, then rate of interest per annum is

The original price of a TV set is Rs. 6,000. If the price is discounted by 20% and then raised by 10% for service contract, the price charged by the shopkeeper is

Solve the following : 3/4+{3/4 + 3/4 ÷ (3/4 + 3/4)} = ?