Quantitative Aptitude - Arithmetic Ability Questions

A boat goes 8 km upstream and 12 km downstream in 7hours. It goes 9 km upstream and 18 km downstream in 9 hours. What is the speed (in km/h) of the boat in still water?

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

What is the simplified value of [2/(cot A – tan A)]?

If p/q = (x+3)/(x-3), then what is the value of p2+q2p2-q2 ?

If [7(5x/3 - 3/2)]/2 + 3/2 = 1/4, then what is the value of x?

The least number that must be added to 8961 to make it exactly divisible by 84 is

Of the 5 numbers whose average is 78, the first is 2/11 times the sum of other 4. The first number is

The marked price of an article is 60% more than its cost price. If the article is sold for Rs 300 after offering a discount of Rs 20, then what will be the profit percentage?