Quantitative Aptitude - Arithmetic Ability Questions

A dealer marks a washing machine for Rs. 7500, and allows a discount of 6% on it. Find the selling price

If a + b = 11 and a2+ b2= 61, then value of ab is

A fraction becomes 6/5 when 5 is added to its numerator and becomes 1/2 when 4 is added to its denominator. What will be the value of the fraction?

If a/b = c/d = e/f = 2/5, then what is (5a + 3c + 2e) : (5b + 3d + 2f)?

In each question two equations numbered I and II are given,you haveto solve both the equation and choose the correctanswer.

$$\begin{gathered} I. 5x2+ 28x = -15 \\ II. 3y2+ 11y + 6 = 0 \end{gathered}$$

What is the value of 10.2+10.02+10.002+... upto 9 terms

What approximate value should come in place of the question mark (?) in the following equation (Note: You are not expected to calculate the exact value)? √580×∛510+ 49.999 x 3.999=?

What is the value of [12/(√5 + √3)] + [18/(√5 – √3)]?