An A.P. consists of 50 terms of which 3^rd term is 12 and the last term is 106. Find the 29^th term of the A.P.

Find the sum of first 20 terms of an A.P. whose first term is 3 and the last term is 57.

Find the general term (n^th term) and 23^rd term of the sequence, 3, 1, -1, -3, ………

Is -150 a term of 11, 8, 5, 2, ………?