Yeah they did.
There is no core anymore, it's just one now.
Paper 3, 4, 6 used to be for extended.
Others were core.
paper 3 (MCQ's) is now paper 1
there are gonna be 30 questions instead of 40.
paper 4 (structured questions) is now paper 2.
paper 6 (analysis and evaluation) is now paper 3.
so you need to practice the old ones, i.e, paper 3/paper 4/paper 6.
Hope that helped, lol.