The 4 digits of 2023 can be used to make numbers. You decide what to allow. Here we allow the four standard binary operations of +, -, x and รท, with brackets for clarity. Then we introduce **Concatenation**, so 20 can be used; after that come **powers** and **factorials**. We’ve made 72% of numbers 1 to 50 keeping the digits in the order 2023 just as we did in 2022 for the similar problem. One number, 41, has not been found, the other 13 (26%) were made in some order other than 2023.

The following files are available

- Teacher notes in pdf form (contain answers and data collection sheets)
- Excel file with answers
- ActivInspire Flipchart of classroom slides
- PowerPoint containing classroom slides