Question

91:{910:[500-(115+51.5)]}

Answer 1

\(91:\left\{910:\left[500-\left(115+255\right)\right]\right\}\)

\(91:\left\{910:\left[500-370\right]\right\}\)

\(91:\left\{910:130\right\}\)

\(91:7\)

\(=13\)

Answer 2

12.5^4-7.5^4):5^3-(18.7-5.18):3

Answer 3

=91:{910:[500-(115+255)}

=91:{910:[500-370]}

=91:{910:130}

=91:7

=13