without adding find the sum 1+3+5+7+9+11+13+15+17+19 class 8
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Expla 121 is a perfact square. Since, 55 cannot be expressed as the sum of successive old numbers starting from 1. ∴ 55 is not a perfact square.nation:
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The Sum of +1+3+5+9+11+13+15+17+19 is 100.
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