Quantitative Aptitude - Arithmetic Ability Questions

The two roots of a quadratic equation are given as x = 1/7 and x = -1/8 . The equation can be written as:

On selling rice for Rs. 45 per kg, a shopkeeper bears loss of 20%. To earn a profit of 20%, the selling price should be

If 40% of x = y, then y% of 40 is same as _____ of x.

In a match of 50 overs, team A’s average runs for first thirty overs was 4.5 runs/over while for the remaining 20 overs the average was 5.5 runs/over. Team B chased the target and lost by 10 runs. Find the average runs per over scored by team B. (team B played all the 50 overs). 

If m ­ n = 2 , mn = 15 , (m , n > 0) then the value of m2-n2m3-n3

A trader buys 500 kgs of cotton for Rs 9,000. 10% of this cotton is spoiled due to rain. At what rate (Rs/Kg) should he sell the rest to earn 10% profit?

If two successive discounts of 20% and 30% are given, then what is the net discount (in %)?

Find the largest number of three digits exactly divisible by 15, 18, 27 and 30.