The pair are sent to negotiate a deal for a two course meal at a restaurant, but struggle to work out the costings when meeting with the establishment's manager.
The pair are caught out on the figures, and find it hard to use the calculator. After resorting to a phone and then their heads, the business duo are still finding it difficult to divide 188 by 5.
The restaurant's manager was left less than impressed.
The Apprentice 2012 airs on Wednesdays at 9PM on BBC One.
Watch the teaser clip below...