hello isha khanna,

yes,it is possible to prepare general aptitude for gate in last few days.

all you need to do is you have to spend 2 hours atleast for a day.you have to continue this untill the day before your exam.i hope you were aware of best books,if not let me tell you that.r.s agarwal is always preferrable,but you can  go for any online website like gradeup,geeks for geeks etc since you're having few days.

practice more and more with tricks and formulae,it is very easy to learn aptitude.verabl section is very easiest one,so dont worry.be confident!!!

all the best!

I Hope this information will be useful to you.

if you need additional information,let us know to help you.

Thank you!!!:)