Question

those who help will be marked as the brainliest if.................
(pls help me in this. Those who explain and do the method correctly will be marked as brainliest)
2.without adding find the sum 1+3+5+7+.....+23.

Answer 1

The answer is 12^2.As there are 12 odd numbers between 1 and 23:-

1,3,5,7,9,11,13,15,17,19,21,23