how many questions i need to attempt for CAT?

according 2013 cat,
75% marks =99.9
67%=99.0
55%=97.5
50%=95+
these are the amount of marks u need to score... now how many qus will you attempt is depends on your accuracy...

hat percentile ll,i get if i attemp 20 question?

Depends on what you target ....if it is 99 then for for at least 80, 60 for 90 and 50 foe 80