If the nth term of an A.P. is given by (3n + 2), then the sum of its first three terms is :

1. 21

2. 24

3. 27

4. 32

The last term of the A.P., 5, 12, 19, ….. having 60 terms is :

1. 406

2. 412

3. 416

4. 418

The first term of an A.P. is p and its common difference is q. The 10th term of the A.P. is :

1. p − 9q

2. p + 10q

3. p − 10q

4. p + 9q