ab-initio interviews
You guys should not worry or be afraid. The questions are simple-the high school form one and two kind. For some you don't even have to write them down-you can do mental calculations.
In case you need more clarification just drop me a PM i forward you the topics I documented during the interview stages.
Once again, its form 1 and 2 stuff, so just be cool and relaxed on the D-day and you will 'cruise' through.