Quantitative Aptitude - Arithmetic Ability Questions

A boat cover row 12 km upstream in 4 hours and can cover the same distance downstream in 3 hours. What is the speed (in km/hr) of the boat in still water?

Two pipes of length 1.5 m and 1.2 m are to be cut into equal pieces without leaving any extra length of pipes. The greatest length of the pipe pieces of same size which can be cut from these two lengths will be

If 3 dozen guavas cost Rs. 90, how many guavas can be bought for Rs. 240?

A discount of 45% on an article is equal to the discount of 65% on other article. What is the respective ratio of the marked price of both the articles?

The sum of 2xy(3x + 4y - 5z) and 5yz(2x - 3y) is

tan2Asin2Ais equal to

Reflection of the point (4,-5) in the y-axis is

Find out the odd word/letters/number/number pair from the given alternatives.