Quantitative Aptitude - Arithmetic Ability Questions

A can do a work in 36 days and B in 12 days. If they work on it together, then in how many days will they be able to do the work?

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

A shopkeeper allows a discount of 20% to his customers and still gains 25%. Find the Marked price of an article which costs Rs.600 to the shopkeeper.

The brother is elder to his sister by 6 years. Seven years ago the product of their ages was 72. What is the age of the brother?

The difference between the simple interest obtained by investing Rs. 'X' with 8% per annum for an year and by investing Rs. 'X+1400' with 8% per annum for two years is 240 Rs. Find the value of X.

If a+b=2c then the value of aa-c+cb-c is equal to (where a≠b≠c)

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

A store sells a watch for a profit of 25% of the cost. Then the percentage of profit against selling price is