A grade 4 will be equivalent to a present grade C and a grade 7 will be equivalent to a present grade A.
Here are some sample questions from the new GCSE. In addition to the new content being examined the key changes are that they require:
Better reading and comprehension skills to extract the problem being posed
Recall of most formulae (many of which used to be provided in the exam)
Extended problem solving skills as fewer steps are provided in the form of sub-questions or prompts and some will be non-routine problems
A greater focus on the ability to interpret and communicate mathematically by drawing communications, making chains of mathematical reasoning and presenting mathematical arguments and proofs
Stuck on any of these?! Here are the solutions!