A, B and C invested amounts in the ratio 3 : 4 : 5 respectively. If the schemes offered compound at the rate of 20 % per annum, 15 % per annum and 10 % per annum respectively, then what will be the ratio of their amounts after 1 year? 

A man buys 12 articles for Rs. 12 /- and sells them at the rate of Rs.1.25 per article. His gain percentage is: 

What is the sum of all natural numbers between 100 and 400 which are divisible by 13? 

A shop keeper purchased a chair marked at ₹ 800, at two successive discounts of 10 % and 15% respectively. He spent ₹ 28 on transportation and sold the chair for ₹ 800. His gain percent is: 

If tan α = 2, then the value of   $$ {cosec^2 α - sec^2 α}\over{cosec^2 α + sec^2 α}   $$ is : 

Read the following graph carefully and answer the related questions-

Total number of students (in thousands) participating in comitative exam in various cities.

What is the average number of students appearing in competitive exam from all the states together? 

To do a certain work, the ratio of the efficiencies of X and Y is 5:4. Working together, they can complete the same work in 10 days. Y alone starts the work and leaves after 5 days. The remaining work will be completed by X alone in: