Quantitative Aptitude - Arithmetic Ability Questions

A sum becomes 1.69 times of itself in 2 years when invested at compound interest. What is the per annum rate of interest (in percentage)?

The 3rd and 6th term of an arithmetic progression are 19 and 37 respectively. What is the 13th term?

The rate of discount on an article whose marked price is Rs. 170 and selling price is Rs. 130?

Compute : (50 + 0.5 x 20) / 0.7

Four pairs of words are given below out of which three are alike in some manner and one is different. Which is different from the rest?

Pipes A, B and C are attached to an empty cistern. While the first two can fill the cistern in 4 and 10 hrs, respectively, the third can drain the cistern, when filled, in 6 hrs. If all the three pipes are opened simultaneously when the cistern is half-full, how many hours will be needed to fill the cistern?

The lengths of two parallel sides of a trapezium are 21 cm and 9 cm. If its height is 10 cm, then what is the area (in cm2) of the trapezium?

Suppose that the medians BD, CE and AF of a triangle ABC meet at G. Then AG: GF is