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What is the greatest number of squares you can make by overlapping three squares?

Two Dice

Find all the numbers that can be made by adding the dots on two dice.

Biscuit Decorations

Andrew decorated 20 biscuits to take to a party. He lined them up and put icing on every second biscuit and different decorations on other biscuits. How many biscuits weren't decorated?

Find the Difference

Age 5 to 7 Challenge Level:
Ellie from St Michael's School wrote:

I was thinking before I started, and what I was thinking was I should have the biggest numbers at the bottom. For my first solution, I put a 1 at the top and placed and 3 and 4 in the middle. The 5, 2 and 6 then fit into the bottom. 

Then I tried to put a 2 on the top and had 3 and 5 below in the middle. The 4, 1 and 6 fit into the bottom. 

After that, I tried a 3 at the top and placed 2 and 5 in the middle; 4, 6 and 1 remaining into the bottom line.

Martí from Thau, Barcelona in Spain sent in these:

        2            3             3
        5   3        4  1        5  2
        6   1   4    2  6  5    1  6  4

Nicholas from GSIS in Hong Kong sent in this one:
Kaustab Roy from Vibgyor High in India sent in the following:

I solved find the difference problem. I made four different solutions for the problem and without my parent's help.

Thank you for those solutions, I wonder if that's all there are?