Quantitative Aptitude - Arithmetic Ability Questions

X, Y and Z can do a piece of work in 30,40 and 50 days respectively. All three of them began the work together but Y left 4 days before completion of the work. In how many days was the work completed?

∆LMN is right angled at M. If m ∠N = 45°. What is the length (in cm) of MN, if NL = 6√2 cm?

If x, y, z are the three factors of a3 -7a - 6, then value of x+y+z will be

Marked price of an item is Rs 500. On purchase of 2 items discount is 8%, on purchase of 3 items discount is 16%. Radha buys 5 items, what is the effective discount?

If the successive discounts be 20% , 10% and 5% , then the single equivalent rate of discount is

The diagonal of a square equals the side of an equilateral triangle. If the area of the square is 6√3 sq cm, what is the area of the equilateral triangle?

If 2x/3 - [5(4x/5 - 4/3)]/2 = 1/3, then what is the value of x?

The average of 100 items was found to be 30 . If at the time of calculation , two items were wrongly taken as 32 and 12 instead of 23 and 11 , then the correct average is