Which term of the A.P. 5, 2, -1, ……………….. is -22 ?

Which term of 7 + 11 +15 + ………………. is 67?

Which series is equal to $\frac{n(n+1)}{2}\backslash frac\{n(n+1)\}\{2\}$ ?

Which term of 0.004, 0.02, 0.1, ......… is 12.5 ?

Which term of  $2-\frac{1}{\sqrt{2}}+\frac{1}{4}-\mathrm{.}\mathrm{.}\mathrm{.}\mathrm{.}\mathrm{.}\mathrm{.}\mathrm{.}2-\backslash frac\{1\}\{\backslash sqrt2\}+\backslash frac\{1\}\{4\}-.......$ is $\frac{1}{32}?\backslash frac1\{32\}?$

$n^{th}n^\{th\}$ term of 4 + 9 + 14 + …………….. is

If x, y, z are in A.P, then 2y =

The ratio of the sums of m arithmatic means and n arithmetic means between two numbers is

If the ratio of sum of n terms in two A.P is 2n : n + 1, then the ratio of 8th terms is ………

Arithmetic mean of a and b is