Question

calculati 1/63+2/63+3/63.....35/63

Answer 1

$\frac{1}{63} + \frac{2}{63} + \frac{3}{63} + ... + \frac{35}{63}$
$\frac{1 + 2 + 3 + ... + 35}{63} =$
$\frac{35 \times 36 \div 2}{63}$
$\frac{630}{63 } = 10$