Question

Without actual addition, find the sum of the following:
a) 1+3+57+9+11
b) 1+3+5+7+9+11+13 + 15 +17+19
c 1+3+5+7+9+11+13+ 15 + 17+19+21+ 23+25+27
d) 1+3+5+ 7 + 9 + 11 +13 + 15 17 19 21 23 25 27 29
Which of
fol​

Answer 1

Answer:

a = 81

b = 100

c = 196

d = fol

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Answer 2

Answer:

1. 81

b.108

c.196

d.225