Question
Without adding, find the sum:
$(1 + 3 + 5 + 7 + 9 + 11 + 13 + 15 + 17 + 19 + 21 + 23)$
$(1 + 3 + 5 + 7 + 9 + 11 + 13 + 15 + 17 + 19 + 21 + 23)$
✓
Answer
Sum of first $12$ odd numbers
$= 12^2 = 144.$
$= 12^2 = 144.$
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