Directions : Study the following pie chart carefully and answer the questions. The pie chart represents the percentage of people involved in various occupations.
Total number of people = 20000

The ratio of the people involved in service to that in industry is 

What should come in place of the question mark '?' in the following number series?

9, 19, 40, 83, ?, 345, 696

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 per cent increase in population from 1971 to 1981 is

If x + y + 3 = 0 , then find the value of x³+y³-9xy+9.

If $$cosθ + cos^2θ= 1,$$find the value of $$\sqrt {sin^4θ+cos^2θ} \ $$

if 20% of A = 50% of B, then what percentage of A is B?

If (3x – 2y) : (2x + 3y) = 5 : 6, then one of the values of $${\left({^3\sqrt { x}+\ ^3\sqrt { y}\over ^3\sqrt { x}-\ ^3\sqrt { y} } \right) \ }^2$$ is

The value of $${1.6×1.6×1.6−1.6×1.6×1.6}\over 1.6×1.6+1.6×1.6+1.6×1.6 $$ is