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6 Beads

If you put three beads onto a tens/ones abacus you could make the numbers 3, 30, 12 or 21. What numbers can be made with six beads?

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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?

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What Number?

I am less than 25. My ones digit is twice my tens digit. My digits add up to an even number.

Two-digit Targets

Stage: 1 Challenge Level: Challenge Level:1

Try using cards numbered from $0$ - $9$ or even pieces of torn paper.
Where is the best place to put $1$ when you are aiming for the highest number?
Where is the best place to put $9$ when you are aiming for the lowest number?