$1, 1, 2, 3, 5, 8, 13, 21, 34, \ldots$ is $\ldots \ldots \ldots \ldots . .$

If $x, y, z$ are three consecutive terms of an $A.P.$,then the common difference of the $A.P.$ is........

For an $A.P.$,the $p^{th}$ term is $q$ and the $q^{th}$ term is $p$. Find the general term of the $A.P.$

The sum of the first $n$ terms of an $AP$ whose first term is $8$ and the common difference is $20$ is equal to the sum of first $2n$ terms of another $AP$ whose first term is $-30$ and the common difference is $8$. Find $n$.

Find the $16^{th}$ term and the $n^{th}$ term of the $A.P.$ $9, 12, 15, \ldots$

The $20^{th}$ term of an $A.P.$ is $40$ and the common difference is $2$. Then,its second term is $\ldots \ldots \ldots \ldots$