If  $${3-5x\over 2x}+{3-5y\over 2y}+{3-5z\over 2z}=0$$ then the value of  $${2\over x}+{2\over y}+{2\over z}$$ is:

Find the value of $$ \sqrt{20+\sqrt{29-\sqrt{12+\sqrt{19-\sqrt{9}}}}}$$.

Rectangle ABCD is formed in a circle with centre D. IF AE=6 cm and AD=9 cm, then find the perimeter of the rectangle.

If a : b = 20:5 then find out the value of (13a-9b): (11a-7b)?

The average age of students in a class is 15.8 years. The average age of boys in the class is 16.4 years and that of the girls is 15.4 years. The ratio of the number of boys to the number of girls in the class is:

Direction (94-98): Study the following table to answer the given questions.
         Centre and Post-wise Numbered of candidate

Which centre has the highest number of candidates?

The number 2918245 is divisible by which of the following numbers?

If each edge of a cube is reduced by 25 percent, find the ratio of the volume of the original cube and the resulting cube?