Question

104 × 96 = ?
(a) 9864
(b) 9984
(c) 9684
(d) 9884

Answer 1

(b) 9984

$104\times 96=\left(100+4\right)\left(100-4\right)$
$$\begin{gathered} ={100}^2-4^2 \\ =\left(10000-16\right) \\ =9984 \end{gathered}$$