1 + 3 + 5 + 7 + 9 + 11 + 13 + 15 + 17 + 19 + 21 + 23 + 25 + 27 + 29 + 31 + 33 + 35 + 37 + 39 = 400. 1,3,5,7,9,11,13,15,17,19,21,23,25,27,29,31,33,35,37,39. above are the first 20
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To find the sum of the first 100 numbers, you use S = n*(n+1) / 2 where n =
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The sum of the first n odd numbers is `n^2` . We can easily validate this using the first few values of n. When n=1, so they are the same. When n=2, `1+3=4=2^2` When n=3, `1+3+5=9
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95/5 = 19. 95 + 5 = 100. The two numbers are therefore 95 and 5.
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