At sixes and seven

At sixes and sevens is an idiom that has been in the English language for approximately nine hundred years, though the meaning has changed. We will look at the definition of the phrase at sixes and sevens, where the term possibly comes from, how it has changed, and some current examples of its use in […]
from Grammarist
http://grammarist.com/idiom/at-sixes-and-seven/