Question 8
There are three 1 by 3 cards, each containing three digits in a vertical column. If these three cards are placed side by side as shown in the diagram below, we can read off three three-digit numbers: 264, 918 and 689. What is the smallest three-digit number that can be obtained by rearranging the order of the cards?
$$ \begin{array}{r}2\\9\\6 \end{array}\begin{array}{r}6\\1\\8 \end{array}\begin{array}{r}4\\8\\9 \end{array} $$
$$ \begin{array}{r}2\\9\\6 \end{array}\begin{array}{r}6\\1\\8 \end{array}\begin{array}{r}4\\8\\9 \end{array} $$