### 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?

### 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?

##### Stage: 1 Challenge Level:

We had over 60 correct answers to this challenge. Here are just some of them that also say a bit about what they did.

Nicholas from Congleton wrote:

I used six lego bricks to pretend they were beads on an abacus. I started with six bricks on one side (the units) to make $6$ then swapped it to the tens side to make $60$.
I then took one brick and moved it over to the units side to make $51$, then swapped them over (making $15$).
I moved another from the $5$ to the $1$.
Then I repeated the process until I got to three on each side.

Answers: $6, 60, 15, 51, 42, 24$ and $33$.

P.S.: I wrote down the answers on a jotter as I went along.

Emily from Mount School wrote:

With six beads I made $6, 15, 24, 33, 42, 51, 60$.
I started with all the beads on the units and then just kept moving one across.
I got seven numbers. They were $6, 15, 24, 33, 42, 51$ and $60$.