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{\bf Byungchan Kim }
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{\bf Partition Statistics for Cubic Partition Pairs}
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In this brief note, we give two partition statistics which explain the
following partition congruences: 
\begin{align*} 
b(5n+4) &\equiv 0 \pmod{5}, \\ 
b(7n+a) &\equiv 0 \pmod{7}, \text{if $a=2$, $3$, $4$, or $6$}.  
\end{align*} 
Here, $b(n)$ is the number of $4$-color partitions of $n$ with colors
$r$, $y$, $o$, and $b$ subject to the restriction that the colors $o$
and $b$ appear only in even parts.



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