9a) Certain terms removed | Try

[@tobylyners2844]

I don’t know if you know this man but you give me hope😭 I actually like maths when you teach it please keep doing what you’re doing❤

[@BereketWeletau]

Thank you

[@zuko8023]

God bless

[@thekgomoela2222]

Wait I know this video is from a year ago but I want to know why didn’t you use 300 because it is divisible by 5

[@ricaldo3542]

Look at the pattern, if you were to work backwards the second last number would be 299. Similarly how you have 13 and then 15 except here you're working backwards