Direction: Study the following graph and answer the questions based on it.

What was the percentage decline in the production of fertilizers from 1997 to 1998? 

Directions: The Bar Graph given here shows the population (in crores) of India in various census years. Observe the graph and answer the question based on it.  

The percent increase in population from 1971 to 1981 is 

Direction: Study the following graph and answer the questions based on it.

The ratio of total production of fertilizers in the year 1996 and 1997 to that of total production in the year 1995, 1998 and 2000 is 

Direction: Study the following graph and answer the questions based on it.

In which year was the percentage increase in production as compared to the previous year, the maximum? 

Direction: Study the following graph and answer the questions based on it.

In how many years was the production of fertilizers more than the average production of the given years? 

Direction : What value should come in place question mark(?) in the following questions?

0.75 % of 90 + 0.55 % of 80=?

What approximate value should come in place of question mark.
(1814 .9  ÷  121) x 35.78 ÷ 45.1023 = ? 

Four years ago, the respective ratio between the age of Ram and that of Sonu, was 4 : 9. Tina is ten years older than Ram. Tina is ten years younger than Sonu. What is Tina's present age?