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

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

If $$ cosecθ + cotθ =p $$, then the value of  $${p^2-1}\over{p^2+1}$$ is:

if $${secθ={a\over b},b≠0,then \ {{1-tan^2θ}\over 2-sin^2θ}  }=?$$

if 2x² – 7x + 5 =0, then what is the value of $$x^2+{25\over 4x^2}$$

If a + b + c = 6, a² + b² + c² = 14 and a³ + b³ + c³ = 36, then the value of abc is

The cost price of 27 articles is the same as the selling price of 18 articles. What is the gain percentage?

From a point within an equilateral triangle, perpendiculars drawn to the three sides, are 6 cm, 7 cm and 8 cm respectively. the length of the side of the triangle is:

Directions : The bar graph, given here, shows the demand and production of colour televisions of five companies for Diwali season in the year 2009. Study the graph carefully and answer the questions based on the graph.

The ratio of companies having more demand than production of colour televisions to those having more production than demand is :