Odd numbers between 2 and 30 would be the
sequence:
3, 5, 7, ....,
29
The sum of odd numbers from 1 to n, where n is an odd
number, formula is:
1 +3 + ....+ 2n-1 =
n^2
then,
1 +3+....+ 2(15)-1 =
(15)^2
by subtracting 1 from both
sides:
3+5+...+ 29 = (15)^2 - 1 =
225-1=224
the sum of the odd numbers between 2 and
30 equals 224
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