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How to solve Permutations and Combinations questions hassle free?

How do i solve para jumbles ?

sir how to find the bookmarked questions?

some Of the videos didn't play.. I'm already buy the package.. How to play these videos???

How to view the videos Sir..??

How to improve my vocabulary?

how should i plan my studies if I am a working professional. 

In my graduation semesters I have one or two non-compulsory subjects in every semester,the marks of whose are not considered while calculating our final cgpa as per our university norms. It means the cgpa written on the marksheet doesn't include the marks of these subjects. But the marks obtained by us in these subjects are separately shown below in the marksheet. So while calculating my graduation percentage during cat registration, should I have to consider the marks of those non-compulsory subjects also? I am currently in my 5th sem of grad. My grad will complete next year by June. I'm appearing for cat exam this year. 

how to solve problems like - find remainder of 22^22^22 when it is divided by 13

A spider starts from a point on the bottom edge of a circular cylinder and moves in a spiral manner along the curved surface area such that it reaches the top egdd exactly a it completes one circle. Find the distance covered if radius of cylinder is 8/pi and h=15