1. Multiple choice question

1. An A.P. consists of \(31\) terms. If its \(16^{th}\) term is \(m\), then the sum of all the terms of this A.P. is:

 

2. In an A.P., the first term is \(1\) and the common difference is \(4\). How many terms of the A.P. must be taken for their sum to be equal to \(120\)?