Question

W, X, Y and Z are integers and form numbers WXYZ, WXY and XZ such that WXYZ = WXY × XZ.
Find the value of Z.

• A. 2
• B. 1
• C. 3

Answer 1

$WXYZ=WXY\times XZ$
$XZ=10X+Z$
$WXYZ=WXY(10X+Z)$

Comparing we get $\Rightarrow$ X = 1 and Z = 0