Four open containers of equal volume are connected as shown.

If the capacity of the pipes is greater than the flowrate from the tap, which container will fill first?

\[ \begin{array} { l l l }

& A & B \\
+ & C & D \\
\hline
& E & F \\
\end{array} \]

In the above cryptogram, all the letters represent **distinct** digits.

What is the **minimum possible value** of the 2-digit integer \( \overline{EF}? \)

Note: In cryptogram problems, 0 is not allowed to be a leading (first) digit, since we would just not write anything in its place.

\[ \begin{array} { ccccccc }

1234 & 1243 & 1324 & 1342 & 1423 & 1432 \\
\vdots & & & & & \vdots \\
4123 & 4132 & 4213 & 4231 & 4312 & 4321 \\
\end{array} \]

The 24 distinct 4-digit numbers above have been listed out by arranging 1, 2, 3, and 4 in different orders. What is the sum of these 24 numbers?

\(\)

**Hint**: You do not need to list out all 24 numbers to find the sum.

\(\)

By using 2 straight lines, what is the most number of regions that we can separate the cross into?

Note: Using 1 straight line, it is possible to separate the cross into 3 regions.

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