Dont panic while solving..keep ur cool....
if
DS seems time consuming, stop imagining the situation given in 1) and 2) rather test with numbers
some1 has already said in some forum here, to solve 2) first......so dat we do not land up assuming 1)
decide over ur own strategy to solve such questions.....n keep practicing using the same...
First concentrate on accuracy...and once u r confident about ur concepts, start practicing timed questions..
I hope this will help you.