currency quote & good luck!

A last and trivial question before the D-day. In each of the following currency quotes, could someone please tell me which one is domestic currency: 1) A:B 2) A/B 3) 0.6 A:B 4) 0.6 A per B 5) 0.6 A against B 6) 0.6 A in B My brain is not working anymore. Many thanks for your help and good luck to all!

I’m an idiot

  1. B 2) A 3) B 4) A 5) not sure 6) B