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?
I am less than 25. My ones digit is twice my tens digit. My digits add up to an even number.
Can you find the chosen number from the grid using the clues?
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?