Yes it is fact everything in our life decided by number, your capacity decided by number, your age decided by number, like young, youth or old it is considered by number. Number is very important in our every field of life always parameter of your ability and sustainability.
Grading is also considered by number, Government is formed by number, India is one of the most country in the world called by ” Mother of democracy” here is Government either central or state depend on number game, in parliament total parliamentarians 543 if any political party found 276 parliament members can eligible to form government.
Every human being age number parameter defined his capacity, capability of life dignity; we all heard in our society and circle that you become old not capable to do this job , your life is on ending stage so every capacity, grading considered by numbers.
Number is most important tools to measure your abilities and capabilities to do or not to do.