It’s 2013, and to celebrate the first issue of Maths and Stats by Email for the new year, we’ve got a puzzling problem for you to solve!
Using the digits 2, 0, 1, 3 once each and any of the signs + – x ÷, can you make the number 1? How about 2? Can you make each of the numbers 1–10? You might need brackets () so you can do addition and subtraction before multiplication and division.
There’s a heap of solutions for you to find. Bonus marks for using fewer signs (but still using all of the digits), not using brackets and for keeping the digits in the original order: 2, 0, 1, 3. Leave your best answers in the comments – we’ll be posting our attempt in a few days.