The sum of two numbers is 84 and their HCF is 12. Total number of such pairs of number is 

If the price of petrol be raised by 20%, then the percentage by which a car owner must Reduce his consumption so as not to increase his expenditure on petrol is 

Directions:Study the following table carefully to answer these questions:

Percentage of Marks obtained by six students in six subjects

What are the average marks obtained by all the students in Maths ?

An amount of money appreciates to Rs. 7,000 after 4 years and to Rs. 10,000 after 8 years at a certain compound interest compounded annually. The initial amount of money was 

Vinit and Gopal can do a work together in 4 days. Shyam and Mohan can do the same work in 12 days. So, in how many days can all four complete that work together?

If 80 litres of milk solution has 60% milk in it, then how much milk should be added to make milk 80% in the solution?

Costs of two articles were in the ratio of 16: 23. The cost of first articles increases by 10% and that of second by Rs.477. Now the costs of two articles are in a ratio of 11: 20. The price of the second article (in Rs.) in the beginning was-

What is the equation of a line having slope -1/3 and y-intercept equal to 6?