A and B can do a piece of work in 28 and 35 days respectively. They began to work together but A leaves after sometime and B completed remaining work in 17 days. After how many days did A leave? 

If 4 litres of water is evaporated on boiling from 12 litres of salt solution containing 7 percentage salt, the percentage of salt in the remaining solution is 

The sum of three numbers is 116. The ratio of second to the third is 9 : 16 and the first to the third is 1 : 4 The second number is 

The LCM of two positive integers is twice the larger number. The difference of the smaller number and the GCD of the two numbers is 4. The smaller number is: 

If the time in clock is 12 : 23. What is the time in the mirror? 

Study the graph carefully and answer the following questions.

What is the average production of State C for three years?

Study the graph carefully and answer the following questions.

What is the average production of the five states in the year 1994-95 taken together?

Study the graph carefully and answer the following questions.

How many state showing above average production in 1992-93 showed below average production in 1993-94 ?