If  $$n+{2\over 3}n+{1\over2}n+{1\over7}n=97$$ then the value of n is : 

If $$x+{16\over x}=8$$, then the value of $$x^2+{32\over x^2}$$ is:

If x² + x = 5 then the value of   $${(x+3)^3}+{1\over (x+3)^3}$$ is

The radii of the ends of a frustum of a cone 7 cm high are 5 cm and 3 cm. Find its volume correct to one decimal place. (Use π=22/7)

Direction: What value will come in place of the question mark (?) in the following question?

100, 108, 120, 136, 156, ?

If the angel of elevation of the sun decreases from 45⁰ to 30⁰, then the length of the shadow of a pillar increase by 60 m. The height of the pillar is

If a³ – b³ – c³ – 3abc = 0, then 

Direction: What approximate value will come in place of the question mark (?) in the following question? (You are not expected to calculate the exact value)

{(540.34)/(17.99)} ÷ {(29.99)/(449.89)} × {1/(89.78)} = ?