Quantitative Aptitude - Arithmetic Ability Questions

If the amount on a certain principal in 3 years at 12% rate of interest compounded annually is Rs 12,000, what will be the amount (in Rs) after the 4th year?

P and Q are two alloys which are prepared by mixing tin and lead in the ratio of 12 : 5 and 4 : 3 respectively. If equal quantities of alloys are melted to form athird alloy R, then what is the ratio of tin and lead in alloy R?

A shopkeeper, sold cashew nuts at the rate Rs 1,260 a kg and bears a loss of 8%. Now if he decides to sell it at Rs 1,386 per kg, what will be the result?

If xy = 48 and x2 + y2 = 100, then (x + y) is

A student multiplied a number by 3/10 instead of 10/3. What is the percentage error in the calculation?

In each question two equations numbered I and II are given,you haveto solve both the equation and choose the correctanswer.

$$\begin{gathered} I. 5x2+ 28x = -15 \\ II. 3y2+ 11y + 6 = 0 \end{gathered}$$

The area of the largest sphere ( in cm2) that can be drawn inside a square of side 18 cm is

The marked price of an article is 40% more than its cost price. If 15% discount is given on the marked price, then what will be the profit percentage?