There are ten identical-looking balls, but one is either heavier or lighter than the other nine. How can you determine which is the odd ball and find out whether this ball is heavier or lighter than the others using only three weighings with a balance?
I already have an answer but I'm not confident it is correct. 5 easy points if anyone explains thoroughly and get it right!
I already have an answer but I'm not confident it is correct. 5 easy points if anyone explains thoroughly and get it right!