The sum of three numbers is 264 if the first number be twice the second and third number be one-third of the first, then the second number is

If $1^{2} +2^{2} + 3^{2} + .....+ 10^{2}$ = 385 then $2^{2} +4^{2} + 6^{2} + .....+ 20^{2}$ is

In the ratio x% of y to y% ofx, its fraction value is equals to

Arun is now half as old as his father. Twelve years ago the fathers age was three times as old as Arun. Now the present age of his fathers age is

If a, b, c are in A.P., then $3^{a}, 3^{b}, 3^{c}$ are in

If -1 < r < 1, then the sum of infinite number of a geometric series is

The angle in a semi circle is a ---- - - -

If$\dfrac{a}{3}$=$\dfrac{b}{4}$=$\dfrac{c}{7}$; then $\dfrac{a+b+c}{c}$ is

Which is biggest ratio?
2:3, 3:5, 4:7, 5:8

----- is the first Indian city to get its own logo.