1 3 5 11 21 ? 85

The following question, a series is given, with one term missing. Choose the correct alternative from the given ones that will complete the series. 5, 11, 21, 43, 85, ____

11, 21, 43, 85, 171, 343

3 4 ? 21 85 110 326

Without adding, find the sum: 1 + 3 + 5 + 7 + 9 + 11 + 13 + 15 + 17 + 19 + 21 + 23

Without adding, find the sum: 1 + 3 + 5 + 7 + 9 + 11 + 13 + 15 + 17 + 19+ 21 + 23

Find the sum of n terms of each of the following 2.1 + 5.3 + 8.5 + ……..

If |{:(- 1, 7 , 0),(2, 1, -3),(3, 4, 1):}| = A, then |{:(13, -11 , 5),(- 7, -1 , 25),(-21 , -3, -15):}| is

If A=[(1,2),(3,-5)] then A^-1 is A. [(-5,-2),(-3,1)] B. [(5/11,2/11),(3/11, - 1/11)] C. [(-5/11,-2/11),(-3/11, -1/11)] D. [(5,2),(3,-1)]