Can you solve this? It’s a brilliant puzzle that’s worth discussion.

Can you solve this? It’s a brilliant puzzle that’s worth discussion.

Seems straightforward(ly impossible)! What am I missing? We can’t change the signs or operators?

At first glance, it does seem impossible--all the numbers are odd and the sum of three odd numbers cannot be even, like 30. At least, I think that's true--I was terrible at number theory. But it's certainly true of these eight numbers. OK, let's say these are not base 10 numbers. Since there's a 9 it must be greater than that, and we already know it's not base 10. Ah, voilà,

**in base 11, 3+13+15 = 30.**(translated to base 10, 3+14+16=33).Meh.