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**Without doing the actual addition, find the sum of:**

1 + 3 + 5 + 7 + 9 + ………………… + 51 + 53

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#### Solution

1 + 3 + 5 + 7 + 9 + ……………. + 51 + 53

= Sum of first 27 odd natural number = 272 = 729

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