6.
Without adding, find the sum of the following numbers
(i)1 + 3 + 5 + 7 + 9 =
(ii)1+3+5+ 7 + 9 + 11 + 13 + 15 + 17 =
(iii)1+3+5+7+9+ 11 + 13 + 15 +17+19+21 + 23 +25=
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i) 25
ii)81
iii) 169
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