Question

Without adding ,find the sum of the following numbers 1 + 3 + 5 + 7 + 9 + 11 + 13 + 15 + 17 + 19 + 21 +23 + 25 +27 + 29 + 31​

Answer 1

Answer:

16^2=256

Step-by-step explanation:

Thera are 16 odd numbers in total so the sum of these numbers will be the square of 16,it is one of the properties of Squares

I hope it helps you!

Answer 2

Answer:

n/2(2a+(n-1)d

16/2(2×1(16-1)2)

8(2+15×2)

8×32

256