Without adding, find the sum : (i) 1 + 3 + 5 + 7 + 9

CBSE Class 8 CBSE Class 8 Maths
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Without adding, find the sum :
(i) 1 + 3 + 5 + 7 + 9
(ii) 1 + 3 + 5 + 7 + 9 + 11 + 13 + 15 + 17 + 19
(iii) 1 + 3 + 5 + 7 + 9 + 11 + 13 + 15 + 17 + 19 + 21 + 23

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