Hello Tejaswini Buwa,

To become a pilot you need to know Basic algebra, Ordinary arithmetic , conversion and you have to be accurate in calculations and that does not include advanced math or calculus .

So, even if you're bad in math you can still become a pilot (reasons above).

And coming to the second part of your query, you should be atleast 5'4 to be eligible to become a pilot in IAF but in case of other Commercial airlines required height is 5'1 .

To know more about Pilot as a career check the following page,

"Airline Pilot - Career, Role, Education, Jobs & Salary" https://www.careers360.com/careers/airline-pilot

Hope this helps.