How do I make 9 using only the numbers 2 0 4 8 ?
I don't believe you can because they are multiples of each other, i.e., 2, 4, 8 WITHOUT repeats. With repeats you can such as 8/8=1+(2X4)=9.....and so on.
Our maths teacher said it can definitely be done. He may have used Sqaure Roots etc!