1) Make sure you have answers to these questions:
a) Why the course you are studying?
b) Why Consulting?
c) Why BCG?
2) Train your brain!
a) Do some simple sums without a calculator. None provided in math test.
b) Do some estimation like what is 498x397?
3) The essence of consulting =
a) Cost cutting!
b) Look for the fixed cost, this is unchangable
c) Look for variable cost like cost of acquisitions - this is where consulting is applied!
4) Structure your responses, suggestion:
a) If it is a yes and no answer, you have 50/50 chance to start with! Why yes or why no?
b) State the real problem
c) State the evidence
d) Give some recommendations
5) Time, make sure you think fast using the above!
Don't guarantee success, but hope it helps! All the best to you!