" (iv) "5+(-41)+9+(-39)+13+(-37)+17+...+(-5)+81+(-3)

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

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

Simplify : (7)/(39) - ((-9)/(13)) + (5)/((-26)).

Without doing the actual addition, find the sum of: (i) 1 + 3 + 5 + 7 + 9 + 11+ 13 + 15 + 17+ 19 + 21 + 23 (ii) 1 + 3 + 5 + 7 + 9 + ......+39 + 41 (iii) 1 + 3 + 5 + 7 + 9 + ......+51 + 53

Write the following as mixed fractions. (7)/(2), (8)/(5), (9)/(4), (13)/(5), (17)/(3)