Quantitative Aptitude - Arithmetic Ability Questions

If ab+ba = -1, then the value of a2b-b2a is

In how many years will Rs 2,000 yield Rs 662 as compound interest at 10% per annum compounded annually?

If xy = -18 and x2+ y2= 85, then find the value of (x + y).

The value of x13+x-13x23-1+x-23

A car moving in the morning fog passes a man walking at 4km/h. in the same direction. The man can see the car for 3 minutes and visibility is upto a distance of 130m. The speed of the car is :

The average marks of 56 students is shown as 60. It includes a wrong entry of 92 marks instead of 29 marks. The correct average is _____ .

The ratio of present ages of L and N is 7 : 5. If the age of N after seven years will be 32 years, then what is the present age (in years) of L?

Profit of Rs 1,03,500 has to be divided between three partners A, B and C in the ratio 11:7:5. How much amount (in Rs) does B get?