The $n^{th}$ term of an $A.P.$ is given by $T_{n} = 2n - 1$. Then,the $10^{th}$ term of the $A.P.$ is.........

Find the $10^{th}$ term of the $A.P.$ $\sqrt{2}, 3 \sqrt{2}, 5 \sqrt{2}, \ldots$ (in $\sqrt{2}$)

$A$ person saved $Rs. 16,500$ in all during $10$ years. After the first year,every year he saved $Rs. 100$ more than what he had saved the previous year. Find his savings of the first year.

The number of terms in the finite $A.P.$ $13, 26, 39, \ldots, 650$ is ........

Which of the following sequences is an $A.P.$?

The production of a $TV$ factory increases equally every year. Its production in the $3^{rd}$ year was $600 \, TV$ and its production in the $7^{th}$ year was $700 \, TV$. Find the production in the $1^{st}$ year,in the $10^{th}$ year,and the total production in $7$ years.