Digit Dog saw the Ladybird Box problem on www.nrich.maths.org/144 and thought he’d try it out.

**The Challenge**

The box has 9 little square compartments. Can you put the 6 ladybirds in the box so that there are just 2 ladybirds in every column and every row?

*I wonder how many ways there are to do the puzzle?*

*Does it matter which compartment you put the first ladybird in?*

*What do you need to keep checking?* Remember that each row and each column can only have 2 ladybirds in them.

*How many empty compartments will there be?*

Record your work on this grid

Look at your friend’s solution. *What is the same? What is different?*

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