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प्रश्न
Without adding find the sum:
1 + 3 + 5 + 7 + 9
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उत्तर
We know that the sum of first n odd natural numbers is n2.
Here, we have to find the sum of the first five odd natural numbers.
Therefore, 1 + 3 + 5 + 7 + 9 = (5)2 = 25
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