Study the following table carefully and answer the questions given below.

In which year the percentage change in the case of Agriculture discipline was highest from the previous year?

The HCF and LCM of two numbers are 3 and 2730 respectively. If one of the numbers is 78, find the other number.

A, B, and C alone can do a work in 40 days ,120 days and 36 days respectively. A and B work together for 20 days and leave it incomplete. C carries on the work and complete it alone.  How many days did C take to complete the work?

The average marks of a student in an examination is 63, if he had scored 20 marks in geography and 2 more marks in history, his average marks would have been 65. How many subjects were there in the exam?

At what annual percentage rate, 10 years of simple interest on an amount will be $$ {2\over 5}$$ of the addition?

A and B together can complete a piece of work in 3 days. They start together. But, after 2 days, B left the work, if the work is completed after 2 next days. B alone could do the work in

If $$ secθ-tanθ={1\over\sqrt{3}}$$, the value of secθ.tanθ=?

O is the incentre of ∆ABC and ∠A = 30° then ∠BOC is