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Two Dice

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

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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?

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Writing Digits

Lee was writing all the counting numbers from 1 to 20. She stopped for a rest after writing seventeen digits. What was the last number she wrote?

Butterfly Flowers

Age 5 to 7 Challenge Level:

We had correct solutions to this problem from Rebeccawho goes to Lexden Primary School, and also from Jake, Sam, Rebecca, Ryo, Luke, Katie and Charlie from Moorfields Junior School. Ryo and Luke explain how they arrived at the answer:

We used $10$ and $5$ for $15$, $10$ and $6$ for $16$, $10$ and $2$ for $12$, $10$ and $9$ for $19$, $10$ and $4$ for $14$, $10$ and $1$ for $11$, $10$ and $7$ for $17$ so we did not use $10$ and $3$.

Rebecca from Lexden Primary goes on to say:

The flower number $18$ has no butterflies. It needs a $10$ and a $8$.