Quantitative Aptitude - Arithmetic Ability Questions

If a = 2 , b = ­3 then the value of 27a3 - 54a2b + 36ab2 - 8b3 is

If xy = -30 and x2 + y2 = 61, then find the value of (x + y).

The population of a town is 350000. It increases annually at the rate of 20%. What will be the population after 2 years?

In the following question, select the odd word from the given alternatives.

The average of marks of 17 students in an examination was calculated as 71. But it was later found that the mark of one student had been wronglyentered as 65 instead of 56 and another as 24 instead of 50. The correct average is

The marked price of an article is 10/7 of the cost price and the selling price of that article is 4/5 of the marked price. What is the profit percentage?

Selling price of a watch is Rs 966 and profit percentage is 15%. If selling price is Rs 798, then what will be the loss percentage?

The ratio of selling price to the cost price is 13 : 17. What is the loss percentage?