Fixed Income Sales Interview - Arithmetic Questions?

Hi all, Anyone with experience on Fixed Income Sales interviews? I heard there are normally questions to test mental arithmetic ability. Any ideas or examples? I am guessing calculations on spreads using 1/32s. Any advise would be much appreciated! Thank you.

17X16? 4 3/8 - 3/4? 237+129? etc

Square root of a half is a good oneā€¦