Question

$1$ $3$
$5$ $7$ $9$ $11$

$13$ $15$ $17$ $19$ $21$ $23$

Find the sum of the rows.

Answer 1

The sum of numbers in first row is $1+3=4$.

The sum of numbers in second row is $5+7+9+11=32$.

The sum of numbers in third row is $13+15+17+19+21+23=108$.