Quantitative Aptitude - Arithmetic Ability Questions

A person lent certain sum of money at 5% per annum simple interest and in 15 years the interest amounted to Rs 250 less than the sum lent. What was thesum lent (in Rs)?

Find the value of '?, if the mean of the data set 18, 16, 22, 13, ? = 16.

In what ratio must a mixture of 11% sugar strength be mixed with that of 25% sugar strength so as to get a new mixture of 13% sugar strength?

If tan a = √3 + 2, then the value of tan a - cot a is

If the line DE is drawn parallel to the base BC of a triangle ABC by intersecting the other two sides, then which of the following is the CORRECT equation for this case.

If tan (5x ­- 10°) = cot (5y + 20°), then the value of x + y is

Two trains are moving in the same direction at the speed of 23 km/hr and 77 km/hr. The time taken by faster train to cross a man sitting in the slower train is 40 seconds. What will be the length (in metres) of the faster train?