Quantitative Aptitude - Arithmetic Ability Questions

What is the ratio of simple interest earned on certain amount at the rate of 12% for 6 years and that for 12 years?

What is the value of (sinA -­ 2sin3A)/(2cos3A -­ cosA)?

What is the value of ( 1/2 - cot45) ?

If a retailer offers a discount of 28% on the marked price of his goods and thus ends up selling at cost price, what was the % mark up?

A watch is sold at a discount of 62.5%. If the marked price of the watch is Rs 16320, then what is the selling price (in Rs) of the watch?

The value of x for which the expressions 5x + 17 and 17x - 5 become equal is _____.

Find the products : 0.5 x 0.05 x 0.005 x 500

The co-ordinates of the centroid of a triangle ABC are (1 , -4). What are the co-ordinates of vertex C if co-ordinates of A and B are (3 , -4) and (0 , 5) respectively?