maths genie - personally i think this is the best one - for igcse, it won't show up on the main website so in the search bar, type in mathsgenie igcse (they do edexcel igcse but not sure about the cambridge one) cognito - i mainly used this one for sciences but it has a maths section too https://revisionmaths.com/gcse-maths/gcse-maths-past-papers <this link has past papers for free