" (iv) "5+(-41)+9+(-39)+13+(-37)+17+...

Find the sum of the following series : 5+(-41)+9+(-39)+13+(-37)+17+....+(-5)+81+(-3)

6 7 9 13 26 37 69

9, 13, 21, 37, 61, 133

11, 13, 17, 19, 23, 29, 31, 37, 41, ...

11, 13, 17, 19, 23, 29, 31, 37, 41, (.....) (a) 43 (b) 47 (c) 53 (d) 51

The number of five-digit numbers that contain 7 exactly once is a. (41)(9^3) b. (37)(9^3) c. (7)(9^4) d. (41)(9^4)

The number of five-digit numbers that contain 7 exactly once is a. (41)(9^3) b. (37)(9^3) c. (7)(9^4) d. (41)(9^4)

4 13 17 ? 30 39

9 13 21 37 69 ? 261

8, 43, 11, 41, ?, 39, 17