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answer
stringclasses
2 values
A list of positive integers has the following properties: $\bullet$ The sum of the items in the list is $30$. $\bullet$ The unique mode of the list is $9$. $\bullet$ The median of the list is a positive integer that does not appear in the list itself. Find the sum of the squares of all the items in the list.
\boxed{236}
Find the number of ways to place a digit in each cell of a 2x3 grid so that the sum of the two numbers formed by reading left to right is $999$, and the sum of the three numbers formed by reading top to bottom is $99$. The grid below is an example of such an arrangement because $8+991=999$ and $9+9+81=99$. \[\begin{arr...
\boxed{45}