Quantitative Aptitude - Arithmetic Ability Questions

At what rate of compound interest per annum will a sum of Rs 50000 become Rs 73205 in 2 years?

The points A(3,­-2), B(1,4) and C(­-2,x) are collinear. What is the value of x?

If tanA -­ tanB = X, then the value of X is

If a - b = -6 and a2 + b2 = 44, then ab is

If α + β = 90° and α:β = 2:1, then the ratio of cosα to cosβ is

The percent profit made when an article is sold for Rs. 78 is twice as much as when it is sold for Rs. 69, the cost price of the article is?

Two buses are moving towards each other with speed of 20 km/hr and 34 km/hr respectively. What will be the distance (in metres) between the two buses one second before they collide?

Two students appeared for an examination. One of them secured 21 marks more than the other and his marks were 80% of the sum of their marks. The marks obtained by them are