Question
Fill in the blank.
$1 + 3 + 5 + 7 + 9 + 11 + 13 $= (_______)$^2$.
$1 + 3 + 5 + 7 + 9 + 11 + 13 $= (_______)$^2$.
✓
Answer
$1 + 3 + 5 + 7 + 9 + 11 + 13 = (7)^2$
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