Question

5. Without actual addition, find the sum of the following numbers.
a) 1 + 3 + 5 + 7
b) 1 + 3 + 5 + 7 + 9
c) 1 + 3 + 5 + 7 + 9 + 11
d) 1 + 3 + 5 + 7 + 9 + 11 + 13​

Answer 1

A) 16

B) 25

C) 36

D) 49