Question

Write the sum of all odd numbers from 1 to 150. Pls also give explanation.

Answer 1

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The odd natural numbers from 1 to 150 are: 1, 3, 5, 7, 9, .........., 149. ∴ Sum of all odd natural from 1 to 150 is 5625.

Answer 2

1+3+5+7+9+11+..................................+149

sum of first n odd natural numbers = n^2

so, sum of first 75 odd numbers = (75)^2

= 5625

Answer :

5625