The appenicies for Gen Nav and Met were a little crafty.
The Gen Nav had a CAS table that you were obviously meant to use for the flight log question but I was running out of time, not thinking straight, and could not figure out exactly what I was meant to do with it so I just whizz-wheeled my TAS from CAS, FL and temp.
The Met exam had an upper wind chart for a higher level than the mean temp the question was asking for. This I completely missed. If I had spotted that the mean temp would have been higher than the -20deg I calculated.