Fill up the gaps (indicated by ______) in each of the following A.P.'s.
1, _ , _ , (-50)

Fill up the gaps (indicated by ______) in each of the following A.P.'s. _,_, 19, _,_, 31.

Fill in the gaps (indicated by______) in each of the following G.P.'s. -1, __ , __ , __, -16….

Fill in the gaps (indicated by_______) in each of the following G.P.'s. 0.1, __, __, __, __, 0.000032,….

Fill in the gaps (indicated by_______) in each of the following G.P.'s. (11)/(4), ___ , ___, (22)/(27),…

Fill in the gaps (indicated by '___') in the following A.P. : 34, ___, ___, ___, ___, 48,….

Find the sum of indicated number of terms in each of the following A.Ps. (i) 16, 11, 6, ......, 23 terms.

Find the sum of indicated number of terms in each of the following A.Ps. (iii) -1, 1/4, 3/2,....10 terms.

Find the number of terms in each of the following A.P.s : 18,15 1/2 , 13 , …….. -47

Find the sum of indicated number of terms in each of the following A.Ps. (ii) -0.5, -1.0, -1.5, ....., 10 terms.

Find the sum of indicated number of terms of the following A.P.’s : 5, 2, -1, - 4, -7, ......., n terms.