If a-b=1 and a³-b³=61, then the value of ab will be 

A sum becomes Rs. 2916 in 2 years at 8 % per annum compound interest. The simple interest at 9% per annum for 3 years on the same amount will be 

Study the table and answer the questions and give answer the following questions.

What is the overall average of marks in the four subjects in the year 2009?

If one of the interior angles of a regular polygon is equal to 5/6 times of one of the interior angles of a pentagon, then the no. of sides of the polygon.

Naresh purchased a TV set for Rs. 11,250 after getting a discount of 10 % on the labeled price. He spent Rs. 150 on transport and Rs. 800 on installation. At what price should it be sold so that the profit earned would have been 15 % if no discount was offered? 

In a exam, a student scores four marks for every correct answer and loses one mark for every wrong answer. If Rahul attempts all sixty questions and secures 130 marks, the no of questions Rahul attempted correctly is :

Direction: Percentage of different types of employees in a company in two consecutive years.

The number of A type employees in 1998 was approximately what percent of the number of A type employees in 1997? 

What percent decrease in salary would exactly cancel out the 20 percent increase?