Some important math of ‘UPSC CAPF AC 2018’ are solved.
Another video– how can you find square of any number using new sequence method https://youtu.be/eMfOcnyBlz8
Another video– how to check a number is divisible by 7,11or 13. If 347*68 number is divisible by 7or 13 then find ‘*’ https://youtu.be/uXCcQ55dPEs

source