Quantitative Aptitude - Arithmetic Ability Questions

The population of a town is 200000. It increases annually at the rate of 10%. What will be the population after 2 years?

If Cot θ = 21/20, then what is the value of Sec θ?

Raj purchased two laptops, first for Rs 42500 and the second for Rs 36200. He sold first laptop at a profit of 12% and the second laptop at a loss of 12%.What is the overall profit or loss?

In the given figure, MNOP is a parallelogram. PM is extended to Z. OZ intersects MN and PN at Y and X respectively. If OX = 27 cm and XY = 18 cm, then what is the length (in cm) of YZ?

35 persons are engaged to complete a work in 60 days. After 32 days it is observed that only (2/5)th part of the work has been done. The number of persons to be engaged to complete the remaining work in the said period is

Ajay can do a painting in 12 days. Amit is 70% more efficient than Ajay. What is the number of days Amit would need to finish the same painting?

P(4,2) and R(-2,0) are vertices of a rhombus PQRS. What is the equation of diagonal QS.

Find the standard deviation of {11, 7, 10,13, 9}