Question

How do you use symbols to make the statement 4_5_2_7 = 107 true?

Answer 1

`4xx5^2+7`

Explanation:

It is a matter of 'playing' with combinations until you hit on one that works.

If we can use `4,5 and 2` to make 100 then all we need to do is add the 7.

I had several attempts using factorial to give a higher initial value. These failed. Then I hit upon the idea that we could do this:

`5^2xx4 ->25xx4=100`

Now all we need to do is add the 7. So putting it in the order given we have:

`4xx5^2+7`