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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?

What Number?

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

One of Thirty-six

Can you find the chosen number from the grid using the clues?

Writing Digits

Stage: 1 Short Challenge Level:

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?