40% of the employees in a factory are workers. All the remaining employees are executives. The annual income of each worker is Rs. 39000. The annual income of each executive is Rs. 42000. What is the average annual income of all the employees in the factory together?

The difference between simple interest and compound on Rs. 1200 for one year at 10% per annum reckoned half-yearly is:

How many number are there from 700 to 950 (Including both) which are neither divisible by 3 nor by 7?

A motorist and a scooterist made a journey of 120 km at the same time and from the same place. The graph shows the progress of the journey made by each person. Study the graph and answer the questions.

How far from the start, did the motorist meet the scooterist ? (in km ) 

The distance between the points (4, 8) and (k, -4) is 13. What is the value of k? 

A sum of money lent out at simple interest amounts to ₹720 after 2 years and 1020 after a further period of 5 years. Find the principal. 

A dealer marks his goods at such a price that after allowing a discount of 12.5% for cash payment, he makes a profit of 20%. What is the marked price (in rupees) of the article which costs him Rs. 210?

A shopkeeper sells a watch set on discount of 8% of printed price and gain 25 %. If marked price was Rs. 20,000 then, what was the cost price?